0- 'L ;' -- .- 

.rfy -$ -, .,- 1 4

Jlj·W;I&ILB1;ituC18i$;d`;

he'd a, 17-.' 7 p'-''k4l -'l 1, ' ew ,, P' P '.'P' 'T 4 - '7 IV , I "'  ';r'; . ': , '7 '.  ';

RI bureau of mines

report of investigations 6017

WASHABILITY OF COALS

FROM THE MATANUSKA VALLEY

AND BELUGA RIVER FIELDS, ALASKA

By M. R. Geer and F. D. Fennessy

UNITED STATES DEPARTMENT OF THE INTERIOR

BUREAU OF MINES

1962
WASHABILITY OF COALS

FROM THE MATANUSKA VALLEY

AND BELUGA RIVER FIELDS, ALASKA

»

By M. R. Geer and F. D. Fennessy

4 * + * 4 * » report of investigations 6017

UNITED STATES DEPARTMENT OF THE INTERIOR

Stewart L. Udall, Secretary

BUREAU OF MINES

Marling J. Ankeny, Director

The work upon which this report is based was done under a cooperative agreement between the Bureau of Mines,

U.S. Department of the Interior, and the School of Mineral Engineering, University of Washington.
Geer, Max Richard, 1912-

Washability of coals from the Matanuska Valley and Beluga

River fields, Alaska, by M. R. Geer and F. D. Fennessy.

IWashington] U.S. Dept. of the Interior, Bureau of Mines [1962]

33 p. tables. 27 cm. (U. S. Bureau of Mines. Report of investigations, 6017)

Based on work done in cooperation with the School of Mineral

Engineering, University of Washington.

1. Coal washing. 2. Coal-Alaska. I. Fennessy, F D

joint author. II. Title. (Series)

TN23.U7 no. 6017 622.06173

I

This publication has been cataloged as follows:

U. S. Dept. of the Int. Library
CONTENTS

Page

Introduction and summary ...................... ........... 1

Acknowledgments .......... ...... ........ **........ 2

Laboratory procedure. ................................. 2

Beluga River deposit ............................... 2

Buffalo mine .. ..... ........................................... 4

Evan Jones mine ................................. ....... 5

Mrak mine ..................................... 8

Premier mine ......................................... 9

Appendix.--Float-and-sink tables ........................ 12

TABLES

Sections of Beds

1. Buffalo mine................... ........... 4

2. Evan Jones mine............ ....... ................. 6

3. Premier mine..........e. ...................... 10

Float-and-Sink Tables

1-A. Beluga River deposit ........ ................. 12

2-A. No. 2 bed, Buffalo mine......... ................... 13

3-A. No. 5 bed, Buffalo mine.................. ............. 14

4-A. No. 5 bed, Evan Jones mine.................. . 15

5-A. No. 6 bed, Evan Jones mine ........................ 16

6-A. No. 7 bed, upper bench, Evan Jones mine........... 17

7-A. No. 7 bed, lower bench, Evan Jones mine........... 19

8-A. No. 7A bed, Evan Jones mine....................... 20

9-A. No. 7B bed, upper bench, Evan Jones mine .......... 21

10-A. No. 7B bed, lower bench, Evan Jones mine.......... 23

11-A. No. 7C bed, Evan Jones mine ....................... 24

12-A. Mrak mine ......................................... 25

13-A. "A" bed, Premier mine ............................. 27

14-A. "C" bed, Premier mine.............. ........... 29

15-A. No. 2 bed, Premier mine ........................... 30

16-A. No. 4 bed, Premier mine ........................... 32
WASHABILITY OF COALS FROM THE MATANUSKA VALLEY

AND BELUGA RIVER FIELDS, ALASKA 1

by

M. R. Geer 2 and F. D. Fennessy3

INTRODUCTION AND SUMMARY

All the coal lands in Alaska are publicly owned, and the Federal Government is the principal consumer of coal. Therefore the Government has long

been concerned with the wise utilization of the coal reserves of Alaska as

well as with the availability of coals meeting the specifications for use in

various Government installations. Coal preparation plays a key role in both

of these areas of interest. The proper choice and operation of coal-washing

equipment permits the mining of inferior deposits, minimizes waste of coal in

preparation, and assures a prepared product of the best quality obtainable

from the raw coal. Thus, from time to time, the Bureau of Mines has made

washability examinations on most of the coals mined in Alaska. Generally,

these examinations were made when new mines or new beds were opened, when construction of new preparation plants was being considered, or when the operation of existing plants could be improved by better knowledge of the raw coal.

The purpose of this report is to bring together all the washability data

available on the coals of the Matanuska Valley and Beluga River fields.

The pattern of energy development for the rapidly growing Anchorage area

is not clear at this time. Formerly coal was the only fuel available for

large-scale space heating and power generation. More recently both oil and

natural gas have entered the market, and several hydroelectric projects have

been completed. Additional major hydroelectric projects are being considered.

The role that will be played by coal in this competitive energy market is

uncertain. However, if coal is the fuel used in future power plants or industrial installations, the information contained in this report will be useful

in indicating the quality of the coals that can be supplied and in selecting

proper preparation techniques.

The washability characteristics of the coals examined vary widely. Some

of the coals are not amenable to mechanical cleaning, some can provide only

'Work on manuscript completed October 1961.

2 Chief, Seattle Coal Research Laboratory, Bureau of Mines, Seattle, Wash.

3 Mining engineering technician, Seattle Coal Research Laboratory, Bureau of

Mines, Seattle, Wash.

........... .
2

inferior fuel despite mechanical cleaning, and others are capable of providing

coal of premium quality if properly prepared. Several of the coals contain a

great deal of intermediate-density material, and, therefore, lend themselves

to the production of a middling, or secondary fuel, that might be suitable for

low-cost, minesite power generation.

ACKNOWLEDGMENTS

The work described in this report was conducted at the Bureau of Mines

Coal Research Laboratory in Seattle, Washington, which operated under a cooperative agreement with the School of Mineral Engineering of the University of

Washington. Without exception, the Alaska coal operators cooperated fully in

collecting samples, often defraying the substantial costs of transportation

to the laboratory.

LABORATORY PROCEDURE

In float-and-sink tests on coal coarser than 20-mesh, aqueous solutions

of zinc chloride were used, whereas organic solutions were employed with the

finer sizes. Except with coal from the Buffalo mine, the specific gravity of

the baths ranged from 1.30 to 1.80 in steps of 0.10. With bituminous coals,

the entire size range from the coarsest material down to 20-mesh was tested

together, then each resulting density fraction was further screened into

several more sizes to evaluate the distribution of impurities by size. With

subbituminous coal, this procedure is not feasible, and, therefore, the individual sizes were tested separately.

All ash contents are given on a moisture-free basis.

BELUGA RIVER DEPOSIT

During the field seasons of 1959, 1960, and 1961, the Bureau of Mines

explored a deposit of coal on the Beluga River4 60 airline miles northwest of

Anchorage by diamond drilling to determine the extent and quality of the

reserves. In 1960 a sample was taken for washability examination. A bulldozer was used to remove weathered coal from the outcrop, after which a 1,600-

pound channel sample was cut by hand across the full thickness of the bed. A

section of the bed at the sample location (about 150 feet north of borehole

one) is shown in the following tabulation:

4 Maloney, R. P., Reconnaissance of the Beluga River Coalfield, Alaska:

Bureau of Mines Rept. of Investigations 5430, 1958, 18 pp.

Warfield, R. S., Investigations of Subbituminous Coal Deposits in the Beluga

River Coalfield, Alaska: Bureau of Mines Open File Report, 1961, 70 pp.
3

Section of bed1

«*

Thickness

Composition Feet Inches

Coal.................... .................. 8 5

Fusain ........................................ .. - 2

Coal ............................... 3 7

Clay ................ .... ............. . - 2

Coal.,..... *. .. ..... ........ .... ...... 18 8

Coal, shale streaks ..................... 3 10

Clay .................. .................. - 4

Coal ..................................... 10 2

Clay .............. ..................... - 1

Coal, shale streaks..................... 3 2

Clay .................... . ......... . ...... - 5

Coal. ... ........... .. .................... 1 6

Total thickness of bed and sample... 50 6

1Roof: Clay; floor: Clay and coal streaks.

The coal has the strong, tough structure that is typical of subbituminous

rank.

The sample was shipped to the laboratory in Seattle in sealed drums and

protected against loss of moisture during all steps leading up to the floatand-sink tests. All coal was crushed to pass a 4-inch round-hole screen

before testing. Table 1-A (appendix) shows the specific-gravity analyses.

The specific-gravity composition of the individual sizes are not significantly

different from that of the 4-inch to 0 composite. Little of the material was

lighter than 1.30 specific gravity, and the specific gravity of most of the

coal ranged from 1.30 to 1.50. The heavy impurity content of the coal was

only 5.9 percent. Removal of these impurities would reduce the ash content

from 22.3 to 19.6 percent. However, the amount of heavy impurities in the

sample and the degree of improvement accruing from its removal may be misleading so far as an actual mining operation is concerned. Both the roof and

floor of the bed are clay that is certain to contaminate the run-of-mine

product to some extent, but none of this material was included in the

washability sample.

The clay partings and the clay from the roof and floor are reasonably

firm when dry but tend to soften and swell when exposed to water. Successful

removal of this clay in a cleaning operation would require special attention

to plant design because of the ease with which the clay disintegrates.

Comparatively little additional reduction in ash content could be

achieved by washing at a specific gravity less than 1.80. The loss in yield

sustained would be large compared to the improvement in quality achieved. The

coal has a high inherent ash content, contains an unusually large proportion

of intermediate-density material, and, therefore, does not lend itself to the

production of a low-ash product.

The following tabulation shows an analysis of the raw coal:
4

As Moisture

received free

Moisture................percent 24.4

Volatile matter............do.. 30.1 39.8

Fixed carbon..... ........do.. 28.7 38.0

Ash .................. do.. 16.8 22.2

Sulfur ...................do.. 0.2 0.2

B.t.u. per pound................ 7,160 9,470

The fusibility characteristics of the ash were:

Initial deformation .................... F. 2,550

Softening ............................ . F. 2,680

Fluid ..................... ........... F. 2,760

BUFFALO MINE

The Buffalo Mine in sec. 23, T. 19N., R. 2E. about 50 miles northeast of

of Anchorage produced some coal during World War II. In 1942 the area was

drilled by the Bureaus to determine reserves. In 1951 an attempt was made to

reopen the mine, and washability samples were obtained for use in designing a

preparation plant. At the time of sampling there was no production, the slope

workings were flooded, and the only feasible method of sampling was to cut

large channel samples on entries driven from a water-level rock tunnel that

crosscuts the eight beds comprising the Buffalo series. At three locations

in the No. 2 bed, weathered coal was removed, and a channel sample was cut

from the hanging wall to the footwall; the coal from the three channel samples

was combined into a single sample weighing about 1 ton. The sample procedure

was used in obtaining a sample of the No. 5 bed. Table 1 shows average sections of the two beds:

TABLE 1. - Sections of beds, Buffalo mine 1

No. 2 bed No. 5 bed

Thickness Thickness

of seComposition of section Feet Inches

Coal ..................... 1 5-1/2 Coal .................... 3 -

Shale, brown, hard, sandy - 1 Shale, sandy, coal streaks - 10

Coal..................... 4 1 Coal..................... 1 7

Total thickness of Shale................. - 3-1/2

bed and sample.... 5 7-1/2 Coal...................... 1 6

Total thickness of

__ _ __ bed and sample..... 7 2-1/2

1Hanging wall and footwall: Slickensided, carbonaceous shale and bone.

Actually, neither bed has a true footwall or hanging wall; the beds are

merely coal-rich horizons in a carbonaceous series that is about 52 feet thick.

The carbonaceous shale and bone enclosing the beds are highly slickensided,

fractured, and weak. Therefore contamination of a run-of-mine product by wall

5 Apell, G. A., Moose Creek District of Matanuska Coal Fields, Alaska: Bureau

of Mines Rept. of Investigations 3784, 1944, 36 pp.
5

rock would be greater than usual. The float-and-sink samples contained no

material from the walls other than that included accidentally, and, therefore,

proper allowance must be made in interpreting float-and-sink results.

Table 2-A shows the specific gravity analyses of the No. 2 bed. The sample analyzed only 11.0 percent ash and contained 6.7 percent of impurities

heavier than 1.70 specific gravity. Elimination of these heavy impurities

would reduce the ash content to 7.3 percent. The coal contains a high proportion of material lighter than 1.30 specific gravity, has a low inherent ash

content, and, therefore, lends itself readily to the production of a premiumquality washed coal. For example, a separation at 1.40 specific gravity would

provide a float coal with 4.0 percent ash at a theoretical yield of 80.8 percent. However, as mentioned previously, the yield would not be so high in a

run-of-mine product because of dilution with wall rock.

Table 3-A shows specific-gravity analyses of coal from the No. 5 bed.

This coal analyzed 21.0 percent ash in raw form and had a considerably larger

heavy impurity content than the No. 2 coal--2 1.7 percent. Removal of the

heavy impurities would provide a float coal of 8.1 percent ash. Like coal

from the No. 2 bed, the coal from the No. 5 bed contains a high proportion of

float at 1.30 specific gravity and has a low inherent ash content. Therefore

this coal also is suitable for the production of a clean product of good

quality.

EVAN JONES MINE

The Evan Jones mine about 60 miles northeast of Anchorage is one of the

oldest and largest operations in Alaska. Before 1953 all the production was

from underground workings. Stripping was started in 1953, and by 1960 economic factors dictated closing the underground operation entirely. Some washability data on coal from this mine and the adjacent Eska mine of the Alaska

Railroad were published in 1946. 6

Late in 1959 the possibility of using coals from this area in a minesite

plant to generate electricity for the rapidly growing Anchorage area was being

considered. Therefore the Bureau undertook washability examinations of the

Evan Jones and nearby Mrak coals to establish: (1) The quality of the raw and

washed coals that would be available for such a plant, and (2) the possibility

of producing a middling product for cheaper boiler fuel and concurrently producing premium-quality coal for use in the military installations served by

these mines. Samples for this investigation were collected in 1960.

At the time of sampling, six beds were being mined in the Evan Jones pit,

and two of these were mined in separate benches, making a total of eight different sources of coal. The proportion from the various beds being mined at

any one time was highly variable, and, therefore, arrangements were made to

mine and process the beds separately to permit collecting samples of each

coal. At the cleaning plant the run-of-mine coal was crushed to a top size of

about 2-1/2 inches before cleaning. Samples were collected from a conveyor

belt carrying the 2-1/2-inch to 0 raw coal.

6Geer, M. R., and Yancey, H. F., Washability Characteristics and Washing of

Coals from the Matanuska Field of Alaska: Bureau of Mines Rept. of

Investigations 3840, 1946, 17 pp.
6

Sections of the individual beds are shown in table 2.

TABLE 2. - Sections of beds, Evan Jones minel

No. 5 bed No. 6 bed

Thickness Thickness

Composition of section Feet Inches Composition of section Feet Inches

Bone, coal streaks...... 2 2 Coal ..... ................. 2

Coal.................... - 9 Bone and sandstone .... 1 -

Sandstone, brown........ - 2 Coal.................... 1 7

Coal .................... - 9 Sandstone ............... - 2

Coal and bony coal...... 8 - Coal .................... - 2

Coal .................... 3 8 Sandstone................. - 1

Bone .................... 1 3 Coal .................... - 2

Bone, coal streaks...... 4 5 Thickness of bed.... 5 2

Thickness of bed.... 21 212 __________

No. 7 bed, upper bench No. 7 bed, lower bench

Thickness Thickness

Composition of section Feet Inches Composition of section Feet Inches

Coal ................. - 4 Coal.. ...................... - 9

Sandstone, buff, coal Coal, bony............ - 3

streak.................. - 3 Coal .. .................... - 6

Coal.................... 1 5 Bone, sandstone, coal

Bone ...... ........ ..... - 6 streaks........... -. 2

Coal.................... - 5 Coal.................... - 9

Thickness of bench.. 2 11 Thickness of bench. 2 5

No. 7A bed ___ No. 7B bed, upper bench

Thickness Thickness

Composition of section Feet Inches Composition of section Feet Inches

Coal, bony........ - 5 Coal...................... 2 6-1/2

Coal............ ... 1 8 Coal, bony and bone .... - 5

Shale, carbonaceous, Thickness of bench.. 2 11-1/2

coal streaks.......... - 6

Bone..................... - 5

Shale..... .............. - 1-1/2

Coal.................... 2 5

Bone.................... - 6

Thickness of bed.... 6 -1/2 ____ ___

No. 7B bed, lower bench No. 7C be

Thickness Thickness

Composition of section Feet Inches Composition of section Feet Inches

Coal .................... 2 6 Shale ..... .............. 1

Bone ........................ - 4 Coal............... - 7

Shale, carbonaceous..... - 3 Coal, bony............... - 2

Thickness of bench.. 3 1 Coal ....... ................ - 5

Shale, carbonaceous ...... - 1

Coal............ ........ - 10

Thickness of bed.... 2 2

i

'Hanging walls and footwalls: Prlincipally gray shale.
7

Tables 4-A through 11-A show the specific-gravity analyses of the coals.

The coal from the No. 5 bed is distinctly the dirtiest and most difficult to

treat of the group. This bed contains much less light coal, has a much higher

inherent ash content, and contains more bony material. Beds 6, 7A, and 7C

have an impurity content almost as high as that of bed No. 5 but have a lower

inherent ash content and contain less material of intermediate density. The

raw coal from the upper bench of No. 7B bed analyzed only 13 percent ash,

which equals the quality of the washed coal that can be produced readily from

No. 5 bed by cleaning. This comparison illustrates the extreme range in

washability characteristics exhibited by this group of beds.

In cleaning this group of coals to meet one specification for quality, as

normally is the case in Alaska, satisfactory plant efficiency would require

either careful blending of the raw coal or treatment of the individual coals

at different densities. From a conservation standpoint, the latter course is

preferable. If all the beds are treated at the density required to provide

marketable coal from the No. 5 bed, an inordinately high loss of salable coal

is sustained with the other beds.

Lacking established specifications for the ash content of primary clean

coal and middling or secondary coal, the proportion and quality of material

with specific gravities ranging from 1.40 to 1.60 can be used as an approximate evaluation of the suitability for production of middling. The following

tabulation shows this information:

1.40 to 1.60

Float 1.40 B.t.u. 1 Sink 1.60

Yield, Ash, Yield, Ash, per Yield, Ash,

percent percent percent percent pound percent percent

5.............. 37.0 8.6 23.4 28.3 10,270 39.6 64.0

6.............. 50.1 5.7 13.1 27.8 10,370 36.8 70.2

7, upper bench. 62.9 4.9 16.6 27.9 10,380 20.5 70.7

7, lower bench. 61.7 4.8 13.0 28.9 10,250 25.3 57.9

7A............. 51.3 5.3 12.5 28.4 10,300 36.2 72.3

7B, upper bench 79.4 4.1 8.1 27.4 10,490 12.5 60.2

7B, lower bench 66.7 4.3 9.7 28.3 10,400 23.6 63.9

7C............ 59.4 3.9 5.3 27.0 10,490 35.3 72.2

1Moisture free; calculated from moisture and ash-free values.

All the potential middling products have about the same ash content and

heating value, but the proportion of such material varies widely. The No. 5

bed contains 23 percent of intermediate-density material, whereas the No. 7C

bed contains only about 5 percent.

The foregoing tabulation shows clearly that use of a middling product for

minesite power generation could make available high-quality, primary washed

coal for the remainder of the market. The following tabulation shows proximate

analyses made on the composite float 1.50 specific-gravity fraction from each

bed:
8

_____ Bed

7 7B

Characteristic 5 6 Upper Lower 7A Upper Lower 7C

Volatile matter ...... percent 39.8 41.2 41.9 41.8 41.2 41.6 42.8 41.7

Fixed carbon ............ do.. 47.1 50.5 50.3 51.4 51.0 53.0 51.4 53.4

Ash .................... do.. 13.1 8.3 7.8 6.8 7.8 5.4 5.8 4.9

Sulfur .................. do.. 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.4

B.t.u. per pound............ 12,450 13,180 13,270 13,440 13,270 13,660 13,660 13,670

Ash fusion:

Initial deformation.. 0 F. 2,850 2,850 2,875 2,800 2,850 2,900+ 2,875 2,800

Softening temperature.0 F. 2,900+ 2,900+ 2,900+ 2,850+ 2,900± 2,900+2.900+2 850+

MRAK MINE

The Mrak mine about 70 miles north of Anchorage in the Eska Creek district is a

strip operation at the site of the former Eska mine of the Alaska Railroad. 7 This

part of the coalfield is badly broken by faults, and, therefore, mining is conducted

in a number of relatively small pits. Several beds are worked on the property, but

owing to the extensive faulting these beds are difficult to correlate between themselves or with the Jonesville series in the adjacent Evan Jones mine. The quality

of the coal in the various pits is highly variable.

A sample for washability examination was collected

investigation of coals available for power generation.

done in the No. 3 pit, East Extension, in a bed locally

of the bed is shown in the following tabulation:

early in 1960 as part of the

At that time mining was being

called the No. 3. A section

Section of bed1

Thickness Thickness

Composition Feet Inches Composition Feet Inches

Coal....................... 2 7 Shale, sandy ............... - 1/2

Shale, carbonaceous, hard.. - 4 Coal....................... 1 8

Coal...... .............. 2 6-1/2 Coal, bony................ - 1-1/2

Coal, bony ................. - 8 Coal....................... 1 4

Coal....................... 1 Clay...................... - 2

Shale, sandy............... - 1-1/2 Coal....................... - 6

Coal ............. 1 8 Clay........................ - 3

Shale, coal streaks........ - 10 Coal............... ...-... 6

Coal............................. 8 Total thickness of bed. 15 -

1Hanging wall: Sandy shale; footwall: Shale.

Here the No. 3 bed did not contain much interbedded heavy impurity, but because of

the pitch of the strata and other conditions in the pit, hanging wall and footwall

material could not effectively be kept out of the run-of-mine product.

After the raw coal was crushed to a top size of 2-1/2 inches it was sampled at

the cleaning plant. The specific-gravity analyses are shown in table 12-A. The raw

7Work cited in footnote 6.

Jolley, Theodore R., Toenges, Albert L., and Turnbull, Louis A., Bituminous-Coal

Deposits in the Vicinity of Eska Matanuska Valley Coal Field, Alaska: Bureau of

Mines Rept. of Investigations 4838, 1952, 87 pp.
9

coal analyzed 23.7 percent ash and contained 20.9 percent impurities with a

specific gravity greater than 1.80. The removal of the impurities would provide a float coal containing 10.6 percent ash. An additional reduction in ash

content of about 2 percentage points could be made without great loss in yield,

but the production of a clean coal with less than 8 or 9 percent ash would

involve a rejection of much intermediate-density material. The impurities

exhibited a pronounced tendency to concentrate in the coarsest and finest

sizes of the raw coal, with the intermediate sizes containing less than half

as much sink 1.80 specific-gravity material.

Because of the variations in both bed composition and mining conditions

that are characteristics of this property,the present analysis may or may not

be typical, particularly with respect to the amount of impurities.

PREMIER MINE

In 1953 a stripping operation known as the Premier mine was opened in the

NW1/4 sec. 27, T. 19N., R. 2E. in the Moose Creek district at the site of an

earlier underground mine with the same name. Difficulty in meeting market

specifications and loss of coal in the washery dictated a washability examination, and samples for this purpose were collected in 1956.

The mine consisted of two strip pits in which the strata were inclined

from 60° to vertical. In one of the pits, beds locally-termed "A" and "C"

and believed to be members of the Jonesville series were worked. In the other

pit, beds Nos. 2 and 4 of the Premier series were mined. Arrangements were

made to mine and process coal from each bed separately to permit the collection of samples. These samples were obtained in the washery after the run-ofmine product had been crushed to a top size of 2-1/2 inches. Each sample

weighed about 1,200 pounds.

Table 3 shows sections of the beds. With the exception of the footwall

of the "A" bed, the walls of all the beds were composed of comparatively weak

material that could not be kept completely out of the coal during loading.

Thus the samples contain wall rock as well as interbedded impurities.

Tables 13-A through 16-A show the specific-gravity analyses of these

coals. The proportion of impurities with a specific gravity greater than 1.80

was unusually high in all the coals, ranging from 36.9 percent in the "A" bed

to 56.8 percent in the No. 4. Similarly, the proportion of intermediatedensity material was universally high. Both the heavy impurity and the

intermediate-density material tended to concentrate in the coarser sizes.

This is particularly evident with the No. 4 coal, in which the 2-1/2- to 1-

inch size contained 78 percent of the heavy impurities and analyzed 65.7

percent ash.
Composition of section

Coal....................

Bone and shale..........

Coal.*............ ...

Shale, firm ............

Coal....... **.... ....

Shale, firm.............

Coal....................

Thickness of bed....

Composition of section

Coal, bone streaks......

Shale, firm.............

Coal, bright............

Bone...................

Shale, brown, friable...

Bone......o.............

Coal, bright............

Coal, bony..............

Coal...... .............

Bone and shale, hard....

Coal, bright............

Bone.........e..........

Coal, bright............

Bone.......... ........

Coal ...................

Bone......... ..........

Thickness of bed....

"A" bed

Feet

4

1

8

I Thickness

Inches

10-3/8

7-3/4

10

3-1/2

3-1/2

3-1/2

7

9-5/8

10

TABLE 3. - Sections of beds, Premier mine 1

No. 2 bed

.ini

Feet

2

1

1

1

1

1

-

1

14

-

Stan - -

cKness

Inches

3

4

5

6

3

6

2

11

6

5

1

8

5

4

8

5

Composition of section

Coal, partly bony.......

Shale and bone..........

Coal, partly bony.......

Thickness of bed....

Bone, slickensided, coal

streaks...............

Shale, hard............

Coal, bone streaks......

Bone and bony coal......

Coal....................

Bone....................

Coal, bony streaks .....

Coal, bright............

Bone, bony coal, coal

streaks.. .............

Thickness of bed....

Composition of section

Thickness

1

4

2

1

1

2

3

17

Feet

"C" bed

Inches

7

7

2-1/4

7-1/8

7

2-3/4

2-3/4

2-7/8

I

2-1/8

4-7/8 -L -t - .,- -,

No. 4 bed

Inh

Feet

3

2

2

7

-1 . - - - - -

cKness

Inches

7

7

l - - . . - - . . . - .

'Hanging walls and footwalls: . = r . = r - - r ,--

" _ J 1 - 1 ~ _ - - It -I- - _ I A A - - -- - - - - - - - I _ I _

rrncilpaily sllcKenslaea, caroonaceous snare.

None of these beds lends itself to the production of low-ash coal. Under

current market conditions, these coals would have to be cleaned to about 12

percent ash. The yields of float coal of this quality ranged from 37.8 to

51.5 percent. Rejection of so much refuse is prohibitive. Even the production of middling is not attractive, as shown by the following tabulation:

1.40 to 1.60

Float 1.40 B.t.u. 1 Sink 1.60

Yield, Ash, Yield, Ash, per Yield, Ash,

Bed __percent percent percent percent pound percent percent

"A".... 39.4 8.3 15.6 27.4 10,340 45.0 74.0

1"C"T.......... 28.2 7.2 19.1 28.7 10,050 52.7 67.3

2., e ..... 38.1 5.1 10.5 29.3 10,130 51.4 71.9

4...... 27.6 4.9 8.7 29.5 10,060 63.7 74.4

'Calculated from moisture-free and ash-free values.
11

The amount of the 1.40 to 1.60 specific-gravity fraction ranged from 8.7

to 19.1 percent and contained 27 to 30 percent ash; this material would have

a heating value in excess of 10,000 B.t.u. per pound. However, even with the

production of a middling with this grade, the proportion of refuse to be

rejected would still average over 50 percent of the raw product. The proportion of primary clean coal, ranging from 28 to 39 percent, probably is too

small to be of interest. If a market for high-ash fuel were available in the

immediate area, a two-product cleaning operation to remove only the clean rock

would be the best means of utilizing these coals.

The following tabulation shows the proximate analyses of the composite

float coal at 1.60 specific gravity from each bed:

Bed

Characteristic A C 2 4

Volatile matter ........... percent 36.2 33.9 35.2 35,9

Fixed carbon ................ do.. 50.1 50.2 54.5 53.3

Ash........ ....... .. . .. .. do.. 13.7 15.9 10.3 10.8

Sulfur ............. .. ... . do.. 0.4 0.4 0.3 0.4

B.t.u. per pound................. 12,290 11,850 12,850 12,760
Size and weight

4 to 2 inches:

35.3 percent........

2 inches to 1 inch:

31.5 percent........

1 to 1/4 inch:

24.5 percent.........

1/4 inch to 20-mesh:

7.6 percent..........

20-mesh to 0:

1.1 percent..........

Composite, 4 inches to 0:

100.0 percent........

Specific

ggravity

Under

1.30 to

1.40 to

1.50 to

1.60 to

1.70 to

Over

Under

1.30 to

1.40 to

1.50 to

1.60 to

1.70 to

Over

Under

1.30 to

1.40 to

1.50 to

1.60 to

1.70 to

Over

Under

1.30 to

1.40 to

1.50 to

1.60 to

1.70 to

Over

Under

1.30 to

1.40 to

1.50 to

1.60 to

1.70 to

Over

Under

1.30 to

1.40 to

1.50 to

1.60 to

1.70 to

Over

1.30

1.40

1.50

1.60

1.70

1.80

1.80

1.30

1.40

1.50

1.60

1.70

1.80

1.80

1.30

1.40

1.50

1.60

1.70

1.80

1.80

1.30

1.40

1.50

1.60

1.70

1.80

1.80

1.30

1.40

1.50

1.60

1.70

1.80

1.80

1.30

1.40

1.50

1.60

1.70

1.80

1.80

12

APPENDIX. - FLOAT-AND-SINK TABLES

TABLE 1-A. - Specific-gravity analyses of coal from Beluga River deposit

Weightpercent

8.6

55.4

21.8

6.4

2.0

1.3

4.5

7.0

54.5

16.1

10.0

3.6

2.3

6.5

5.0

53.1

18.7

6.4

6.9

4.9

5.0

.2

30.3

34.0

3.8

11.3

8.7

11.7

.4

10.3

37.1

18.1

12.7

7.7

13.7

6.5

52.2

20.3

7.5

4.5

3.1

5.9

Ash,

percent

4.7

13.3

28.3

39.9

49.2

59.5

71.4

4.7

13.0

27.5

38.3

48.4

56.5

67.2

4.5

11.3

26.6

37.1

44.0

53.2

65.3

10.1

7.5

16.2

25.3

32.3

40.4

54.1

9.0

8.0

15.2

25.1

32.3

42.1

60.7

4.7

12.4

25.9

37.7

43.3

51.9

65.8

Weightpercent

Cumulat ve

8.6

64.0

85.8

92.2

94.2

95.5

100.0

7.0

61.5

77.6

87.6

91.2

93.5

100.0

5.0

58.1

76.8

83.2

90.1

95.0

100.0

.2

30.5

64.5

68.3

79.6

88.3

100.0

.4

10.7

47.8

65.9

78.6

86.3

100.0

6.5

58.7

79.0

86.5

91.0

94.1

100.0

Ash,

percent

4.7

12.1

16.2

17.9

18.6

19.1

21.5

4.7

12.1

15.3

17.9

19.1

20.0

23.1

4.5

10.7

14.6

16.3

18.4

20.2

22.5

10.1

7.5

12.1

12.8

15.6

18.0

22.3

9.0

8.0

13.6

16.8

19.3

21.3

26.7

4.7

11.5

15.2

17.2

18.5

19.6

- - - - -

i -=., - ^ . - 22.3 = . . . . . - -

..--
»

Size and weight

2 inches to 1 inch:

25.2 percent........

1 to 1/4 inch:

44.1 percent........

1/4 inch to 20-mesh:

25.8 percent........

Under 20-mesh:

4.9 percent.........

Composite, 2 inches to 0:

100,0 percent.......

Under

1.30

1.40

1.50

1.60

Over

1

1

1

1

13

TABLE 2-A. - Specific-gravity analyses of coal from No. 2 bed,

Buffalo mine

Under

1.30 1

1.40 1

1.50 1

1.60 1

Over

Under

1.30 1

1.40 1

1.50 1

1.60 1

Over

Under

1.30 1

1.40 1

1.50 1

1.60 1

Over

Under

1.30 1

1.40 1

1.50 1

1.60 1

Over

to

to

to

to

to

to

to

to

to

to

to

to

to

to

to

to

to

to

to

to

Specific

gravity

1.30

1.40

1.50

1.60

1.70

1.70

1.30

1.40

1.50

1.60

1.70

1.70

1.30

1.40

1.50

1.60

1.70

1.70

1.30

1.40

1.50

1.60

1.70

1.70

1.30

1.40

1.50

1.60

1.70

1.70

48.2

21.6

9.9

8.0

3.1

9.2

63.8

19.9

5.2

3.5

2.1

5.5

62.4

24.9

3.9

2.3

1.4

5.1

52.2

26.4

3.8

2.4

1.8

13.4

58.9

21.9

6.0

4.3

2.2

6.7

Weightpercent

2.6

10.4

23.1

32.0

35.8

59.5

2.3

9.9

23.4

33.2

40.5

60.9

1.7

6.2

22.0

31.8

40.5

63.9

1.6

5.3

20.4

33.7

39.6

70.1

2.2

8.7

22.9

32.5

38.8

61.9

Ash,

percent

Weightpercent

48.2

69.8

79.7

87.7

90.8

100.0

63.8

83.7

88.9

92.4

94.5

100.0

62.4

87.3

91.2

93.5

94.9

100.0

52.2

78.6

82.4

84.8

86.6

100.0

58.9

80.8

86.8

91.1

93.3

100.0

Cumulative

Ash,

percent

2.6

5.0

7.3

9.5

10.4

14.9

2.3

4.1

5.2

6.3

7.1

10.0

1.7

3.0

3.8

4.5

5.0

8.0

1.6

2.8

3.7

4.5

5.2

13.9

2.2

4.0

5.3

6.6

7.3

11.0 - - - -.-. -- . -. , , W- -, i W h w . .
Size and weight

2 inches to 1 inch:

25.1 percent........

1 to 1/4 inch:

48.7 percent........

1/4 inch to 20-mesh:

21.1 percent........

Under 20-mesh:

5.1 percent.........

Composite, 2 inches to 0:

100.0 percent......

Specific

- g ravity

Under

1.30 to

1.40 to

1.50 to

1.60 to

Over

Under

1.30 to

1.40 to

1.50 to

1.60 to

Over

Under

1.30 to

1.40 to

1.50 to

1.60 to

Over

Under

1.30 to

1.40 to

1.50 to

1.60 to

Over

Under

1.30 to

1.40 to

1.50 to

1.60 to

Over

1.30

1.40

1.50

1.60

1.70

1.70

1.30

1.40

1.50

1.60

1.70

1.70

1.30

1.40

1.50

1.60

1.70

1.70

1.30

1.40

1.50

1.60

1.70

1.70

1.30

1.40

1.50

1.60

1.70

1.70

14

TABLE 3-A. - Specific-gravity analyses of coal from No. 5 bed,

Buffalo mine

Weightpercent

33.9

12.4

7.3

6.9

7.2

32.3

55.2

15.1

5.1

3.1

2.5

19.0

55.9

20.1

4.0

2.3

1.9

15.8

54.6

17.7

4.0

2.1

2.1

19.5

50.0

15.6

5.4

3.8

3.5

21.7

Ash,

percent

2.0

12.0

23.9

34.0

43.2

66.3

1.8

10.3

23.4

33.6

42.1

67.7

1.5

6.8

22.6

33.5

41.9

68.3

1.4

6.3

28.3

32.8

42.0

69.9

1.7

9.5

23.6

33.7

42.6

67.4

Weightpercent

Cumulative

33.9

46.3

53.6

60.5

67.7

100.0

55.2

70.3

75.4

78.5

81.0

100.0

55.9

76.0

80.0

82.3

84.2

100.0

54.6

72.3

76.3

78.4

80.5

100.0

50.0

65.6

71.0

74.8

78.3

100.0

Ash,

percent

2.0

4.7

7.3

10.3

13.8

30.8

1.8

3.6

5.0

6.1

7.2

18.7

1.5

2.9

3.9

4.7

5.6

15.5

1.4

2.6

3.9

4.7

5.7

18.2

1.7

3.6

5.1

6.5

8.1

--.l -- - .

21.0 .. . . . . -- - l - . -
Size and weight

2-1/2 inches to 1 inch:

20.8 percent.......

1 to 1/4 inch:

46.0 percent.........

1/4 inch to 20-mesh:

27.0 percent........

20-mesh to 0:

6.2 percent.........

Composite, 2-1/2 inches

to 1/4 inch:

66.8 percent.......

Composite, 1/4 inch to 0:

33.2 percent........

Specific

gravity

Under

1.30 to

1.40 to

1.50 to

1.60 to

1.70 to

Over

Under

1.30 to

1.40 to

1.50 to

1.60 to

1.70 to

Over

Under

1.30 to

1.40 to

1.50 to

1.60 to

1.70 to

Over

Under

1.30 to

1.40 to

1.50 to

1.60 to

1.70 to

Over

Under

1.30 to

1.40 to

1.50 to

1.60 to

1.70 to

Over

Under

1.30 to

1.40 to

1.50 to

1.60 to

1.70 to

Over

1.30

1.40

1.50

1.60

1.70

1.80

1.80

1.30

1.40

1.50

1.60

1.70

1.80

1.80

1.30

1.40

1.50

1.60

1.70

1.80

1.80

1.30

1.40

1.50

1.60

1.70

1.80

1.80

1.30

1.40

1.50

1.60

1.70

1.80

1.80

1.30

1.40

1.50

1.60

1.70

1.80

1.80

15

TABLE 4-A. - Specific-gravity analyses of coal from No. 5 bed,

Evan Jones mine

Weightpercent

2.7

18.4

20.4

10.7

7.2

8.0

32.6

13.1

22.4

15.6

9.5

6.2

5.4

27.8

27.4

21.7

10.4

6.0

4.6

4.2

25.7

23.1

26.5

9.2

6.3

5.2

4.6

25.1

9.9

21.1

17.1

9.9

6.5

6.2

29.3

*26.6

22.6

10.2

6.0

4.7

4.3

25.6

Ash,

percent

3.6

14.5

25.0

35.5

44.8

52.1

71.1

3.1

13.4

25.3

35.2

44.4

51.2

70.6

2.3

10.9

23.8

34.5

43.2

50.1

71.0

3.5

9.9

23.2

33.6

41.5

49.5

68.6

3.1

13.7

25.2

35.3

44.5

51.6

70.8

2.5

10.7

23.7

34.3

42.9

50.0

70.6

Weightpercent

Cumulative

2.7

21.1

41.5

52.2

59.4

67.4

100.0

13.1

35.5

51.1

60.6

66.8

72.2

100.0

27.4

49.1

59.5

65.5

70.1

74.3

100.0

23.1

49.6

58.8

65.1

70.3

74.9

100.0

9.9

31.0

48.1

58.0

64.5

70.7

100.0

26.6

49.2

59.4

65.4

70.1

74.4

100.0

Ash,

percent

3.6

13.1

19.0

22.3

25.1

28.3

42.2

3.1

9.6

14.4

17.7

20.1

22.5

35.8

2.3

6.1

9.2

11.5

13.6

15.7

29.9

3.5

6.9

9.5

11.8

14.0

16.2

29.3

3.1

10.3

15.6

19.0

21.5

24.2

37.8

2.5

6.3

9.3

11.6

13.7

15.8

29.8
Size and weight

2-1/2 inches to 1 inch:

15.2 percent.........

1 to 1/4 inch:

45.2 percent.........

1/4 inch to 20-mesh:

32.5 percent........

20-mesh to 0:

7.1 percent..........

Specific

g- ravity

Under

1.30 to

1.40 to

1.50 to

1.60 to

1.70 to

Over

Under

1.30 to

1.40 to

1.50 to

1.60 to

1.70 to

Over

iUder

1.30 to

1.40 to

1.50 to

1.60 to

1.70 to

Over

Under

1.30 to

1.40 to

1.50 to

1.60 to

1.70 to

Over

16

TABLE 4-A. - Specific-gravity analyses of coal from No. 5 bed,

Evan Jones mine (Con.)

Cumulative

Specific Weight- Ash, Weight- Ash,

Size and weight gravity percent ercent percent percent

Under 1.30 15.4 2.8 15.4 2.8

1.30 to 1.40 21.6 12.7 37.0 8.6

Composite, 2-1/2 inches 1.40 to 1.50 14.8 24.8 51.8 13.2

to 0: 1.50 to 1.60 8.6 35.1 60.4 16.3

100.0 percent ....... 1.60 to 1.70 5.9 44.1 66.3 18.8

1.70 to 1.80 5.6 51.2 71.9 21.3

Over 1.80 28.1 70.7 100.0 35.2

TABLE 5-A. - Specific-gravity analyses of coal from No. 6 bed,

Evan Jones mine

1.30

1.40

1.50

1.60

1.70

1.80

1.80

1.30

1.40

1.50

1.60

1.70

1.80

1.80

1.30

1.40

1.50

1.60

1.70

1.80

1.80

1.30

1.40

1.50

1.60

1.70

1.80

1.80

9.8

16.5

8.5

6.0

4.5

5.9

48.8

27.7

20.2

9.7

5.6

4.0

3.4

29.4

43.6

19.2

6.2

3.6

2.6

2.3

22,5

33.4

24.0

6.6

4.5

3.6

2.9

25.0

Weightpercent

2.8

11,9

24.6

35.2

42.7

50.4

75.9

2.4

11.5

24.2

34.8

43.5

51.1

76.0

2.0

9.6

22.9

33.6

42.4

49.5

76.3

3.9

10.9

23.2

32.5

40.8

47.7

71.6

Ash,

percent

Cumulative

9.8

26.3

34.8

40.8

45.3

51.2

100.0

27.7

47.9

57.6

63.2

67.2

70.6

100.0

43.6

62.8

69.0

72.6

75.2

77.5

100.0

33.4

57.4

64.0

68.5

72.1

75.0

100.0

Weightpercent

2.8

8.5

12.4

15.8

18.5

22.1

48.4

2.4

6.2

9.3

11.5

13.4

15.2

33.1

2.0

4.3

6.0

7.4

8.6

9.8

24.8

3.9

6.8

8.5

10.1

11.6

13.0

27.7

Ash,

percent

I
Size and weight

2-1/2 inches to 1 inch:

16.5 percent........

1 to 1/4 inch:

49.1 percent........

Specific

gravity

. - . . . -. .-

Under

1.30 1

1.40 1

1.50 1

1.60 i

1.70

Over

17

TABLE 5-A. - Specific-gravity analyses of coal from No. 6 bed,

Evan Jones mine (Con.)

Cumulative

Specific Weight- Ash, Weight- Ash,

Size and weight gravity percent percent percent percent

Under 23.2 2.4 23.2 2.4

1.30 to 1.40 19.3 11.6 42.5 6.6

Composite, 2-1/2 inches 1.40 to 1.50 9.4 24.3 51.9 9.8

to 1/4 inch: 1.50 to 1.60 5.7 34.9 57.6 12.3

60.4 percent........ 1.60 to 1.70 4.1 43.3 61.7 14.3

1.70 to 1.80 4.0 50.8 65.7 16.6

Over 1.80 34.3 76.0 100.0 36.9

Under 1.30 41.8 2.3 41.8 2.3

1.30 to 1.40 20.0 9.9 61.8 4.8

Composite, 1/4 inch to 0: 1.40 to 1.50 6.3 23.0 68.1 6.4

39.6 percent........ 1.50 to 1.60 3.8 33.4 71.9 7.9

1.60 to 1.70 2.8 42.0 74.7 9.2

1.70 to 1.80 2.4 49.1 77.1 10.4

Over 1.80 22.9 75.4 100.0 25.3

Under 1.30 30.5 2.4 30.5 2.4

1.30 to 1.40 19.6 10.9 50.1 5.7

Composite, 2-1/2 inches 1.40 to 1.50 8.2 23.9 58.3 8.3

to 0: 1.50 to 1.60 4.9 34.4 63.2 10.3

100.0 percent ....... 1.60 to 1.70 3.6 42.9 66.8 12.1

1.70 to 1.80 3.4 50.4 70.2 13.9

Over 1.80 29.8 75.8 100.0 32.4

TABLE 6-A. - Specific-gravity analyses of coal from No. 7A bed,

Evan Jones mine

Under

1.30

1.40

1.50

1.60

1.70

Over

i

to

to

to

to

to

to

to

to

to

to

1.30

1.40

1.50

1.60

1.70

1.80

1.80

1.30

1.40

1.50

1.60

1.70

1.80

1.80

18.3

18.6

11.0

7.3

4.5

4.6

35.7

35.3

18.7

7.6

5.2

3.8

3.3

26.1

Weightpercent

2.7

12.5

24.6

35.1

45.6

53.3

76.5

2.1

11.6

24.5

34.6

44.0

52.0

77.6

. . . -

. -

Ash,

percent

Cumula

Weight,

percent

18.3

36.9

47.9

55.2

59.7

64.3

100.0

35.3

54.0

61.6

66.8

70.6

73.9

100.0

tive

Ash,

percent

2.7

7.6

11.5

14.7

17.0

19.6

39.9

2.1

5.4

7.7

9.8

11.7

13.5

30.2

---
Size and weight

1/4 inch to 20-mesh:

28.6 percent .......

20-mesh to 0:

5.8 percent.........

Composite, 2-1/2 inches

to 1/4 inch:

65.6 percent.......

Composite, 1/4 inch to 0:

34.4 percent........

Composite, 2-1/2 inches

to 0:

100.0 percent.......

Specific

gravity

Under

1.30

1.40

1.50

1.60

1.70

Over

I

I

I

1

1

18

TABLE 6-A. - Specific-gravity analyses of coal from No. 7A bed,

Evan Jones mine (Con.)

Under

1.30 l

1.40

1.50 1

1.60

1.70

Over

Under

1.30

1.40

1.50

1.60

1.70

Over

to

to

to

to

to

to

to

to

to

to

to

to

to

to

to

1.30

1.40

1.50

1.60

1.70

1.80

1.80

1.30

1.40

1.50

1.60

1.70

1.80

1.80

1.30

1.40

1.50

1.60

1.70

1.80

1.80

1.30

1.40

1.50

1.60

1.70

1.80

1.80

1.30

1.40

1.50

1.60

1.70

1.80

1.80

39.5

17.2

5.3

3.4

2.5

2.6

29.5

16.6

25.8

7.6

4.8

4.2

3.7

37.3

31.0

18.7

8.5

5.7

4.0

3.6

28.5

35.6

18.7

5.7

3.6

2.8

2.8

30.8

32.6

18.7

7.5

5.0

3.6

3.3

29.3

Weightpercent

1.8

9.5

23.3

34.2

42.6

49.2

80.3

3.7

9.8

24.2

32.5

42.5

51.0

76.7

2.2

11.8

24.5

34.8

44.5

52.4

77.3

1.9

9.6

23.5

33.8

42.6

49.6

79.6

2.1

11.0

24.3

34.5

43.9

51.6

78.1

Ash,

percent

Weightpercent

39.5

56.7

62.0

65.4

67.9

70.5

100.0

16.6

42.4

50.0

54.8

59.0

62.7

100.0

31.0

49.7

58.2

63.9

67.9

71.5

100.0

35.6

54.3

60.0

63.6

66.4

69.2

100.0

32.6

51.3

58.8

63.8

67.4

70.7

100.0

Ash,

percent

Cumulative

1.8

4.1

5.8

7.3

8.6

10.1

30.8

3.7

7.4

10.0

11.9

14.1

16.3

38.8

Under

1.30 to

1.40 to

1.50 to

1.60 to

1.70 to

Over

Under

1.30 to

1.40 to

1.50 to

1.60 to

1.70 to

Over

2.2

5.8

8.5

10.9

12.9

14.9

32.7

1.9

4.6

6.4

7.9

9.4

11.0

32.1

2.1

5.3

7.8

9.9

11.7

13.5

32.5 . , ., - v . .-. .

-·-
Size and weight

2-1/2 inches to 1 inch:

16.0 percent.......

1 to 1/4 inch:

46.9 percent.......

1/4 inch to 20-mesh

30.2 percent........

20-mesh to 0:

6.9 percent........

Composite, 2-1/2 inches

to 1/4 inch:

62.9 percent.........

Specific

gravity

SI

Under

1.30 to

1.40 to

1.50 to

1.60 to

1.70 to

Over

Under

1.30 to

1.40 to

1.50 to

1.60 to

1.70 to

Over

Under

1.30 to

1.40 to

1.50 to

1.60 to

1.70 to

Over

Under

1.30 to

1.40 to

1.50 to

1.60 to

1.70 to

Over

Under

1.30 to

1.40 to

1.50 to

1.60 to

1.70 to

Over

19

TABLE 7-A. - Specific-gravity analyses of coal from No. 7B bed, .

lower bench, Evan Jones mine

1.30

1.40

1.50

1.60

1.70

1.80

1.80

1.30

1.40

1.50

1.60

1.70

1.80

1.80

1.30

1.40

1.50

1.60

1.70

1.80

1.80

1.30

1.40

1.50

1.60

1.70

1.80

1.80

1.30

1.40

1.50

1.60

1.70

1.80

1.80

Weightpercent

39.2

17.2

6.9

7.7

6.0

4.4

18.6

54.6

14.9

5.7

3.8

3.0

3.0

15.0

55.2

14.6

4.6

3.1

2.7

2.5

17.3

37.4

20.2

5.3

4.1

3.3

3.2

26.5

50.7

15.5

6.0

4.8

3.8

3.3

15.9

Ash,

percent

3.2

12.2

24.9

34.3

43.9

51.1

66.4

2.4

10.9

24.0

34.9

43.9

51.7

70.6

1.9

8.9

22.5

34.2

42.4

50.0

71.8

2.8

10.0

23.2

32.6

40.9

48.4

71.5

'2.6

11.3

24.3

34.7

43.9

51.5

69.4

Cumulative

Weightpercent

39.2

56.4

63.3

71.0

77.0

81.4

100.0

54.6

69.5

75.2

79.0

82.0

85.0

100.0

55.2

69.8

74.4

77.5

80.2

82.7

100.0

37.4

57.6

62.9

67.0

70.3

73.5

100.0

50.7

66.2

72.2

77.0

80.8

84.1

100.0

3.2

5.9

8.0

10.9

13.4

15.5

24.9

2.4

4.2

5.7

7.1

8.5

10.0

19.1

1.9

3.4

4.5

5.7

7.0

8.3

19.3

2.8

5.3

6.8

8.4

9.9

11.6

27.5

2.6

4.6

6.3

8.0

9.7

11.4

20.6

Ash,

percent
20

Size and weight

2-1/2 inches to 1 inch:

16.2 percent........

1 to 1/4 inch:

54.6 percent........

1/4 inch to 20-mesh:

24.8 percent........

Specific

gravity

Under

1.30 to

1.40 to

1.50 to

1.60 to

1.70 to

Over

Under

1.30 to

1.40 to

1.50 to

1.60 to

1.70 to

Over

Under

1.30 to

1.40 to

1.50 to

1.60 to

1.70 to

Over

1.30

1.40

1.50

1.60

1.70

1.80

1.80

1.30

1.40

1.50

1.60

1.70

1.80

1.80

1.30

1.40

1.50

1.60

1.70

1.80

1.80

TABLE 7-A. - Specific-gravity analyses of coal from No. 7B bed,

lower bench, Evan Jones mine (Con.)

Cumulative

Specific Weight- Ash, Weight- Ash,

Size and weight gravity percent percent percent

Under 1.30 51.9 2.0 51.9 2.0

1.30 to 1.40 15.6 9.2 67.5 3.7

Composite, 1/4 inch to 0: 1.40 to 1.50 4.8 22.6 72.3 4.9

37.1 percent........ 1.50 to 1.60 3.3 33.8 75.6 6.2

1.60 to 1.70 2.8 42.1 78.4 7.5

1.70 to 1.80 2.6 49.6 81.0 8.8

Over 1.80 19.0 71.7 100.0 20.8

Under 1.30 51.1 2.4 51.1 2.4

1.30 to 1.40 15.6 10.5 66.7 4.3

Composite, 2-1/2 inches 1.40 to 1.50 5.5 23.7 72.2 5.8

to 0: 1.50 to 1.60 4.2 34.4 76.4 7.3

100.0 percent........ 1.60 to 1.70 3.4 43.3 79.8 8.9

1.70 to 1.80 3.1 50.9 82.9 10.4

.... Over 1.80 17.1 70.3 100.0 20.7

TABLE 8-A. - Specific-gravity analyses of coal from No. 7B bed,

upper bench, Evan Jones mine

· =

Weightpercent

47.4

24.1

7.7

3.9

2.9

2.6

11.4

61.4

20.8

5.1

2.5

1.8

1.5

6.9

62.1

18.7

4.0

2.3

1.7

1.5

9.7

Ash,

percent

2.3

10.8

24.4

33.7

43.7

51.9

59.4

1.9

o0.5

24.7

34.0

42.4

50.8

66.2

1.6

9.1

23.3

33.1

41.1

49.1

70.4

Cumula

Weightpercent

47.4

71.5

79.2

83.1

86.0

88.6

100.0

I

61.4

82.2

87.3

89.8

91.6

93.1

100.0

62.1

80.8

84.8

87.1

88.8

90.3

100.0

2.3

5.2

7.0

8.3

9.5

10.7

16.3

1.9

4.1

5.3

6.1

6.8

7.5

11.6

1.6

3.3

4.3

5.0

5.7

6.4

12.7

t

tive

Ash,

percent
21

Size and weight

2-1/2 inches to 1 inch:

14.8 percent........

Specific

- gravity

Under

1.30 to

1.40 to

1.50 to

1.60 to

1.70 to

Over

1.30

1.40

1.50

1.60

1.70

1.80

1.80

TABLE 8-A. - Specific-gravity analyses of coal from No. 7B bed,

upper bench, Evan Jones mine (Con.) T

Cumulative

Specific Weight- Ash, Weight- Ash,

Size and weight gravity *percent percent percent percent

Under 1.30 40.9 2.6 40.9 2.6

1.30 to 1.40 26.1 9.2 67.0 5.2

20-mesh to 0: 1.40 to 1.50 6.1 22.0 73.1 6.6

4.4 percent......... 1.50 to 1.60 4.1 32.2 77.2 7.9

1.60 to 1.70 2.6 39.6 79.8 9.0

1.70 to 1.80 2.1 47.6 81.9 10.0

Over 1.80 18.1 69.2 100.0 20.7

Under 1.30 58.2 2.0 58.2 2.0

1.30 to 1.40 21.6 10.6 79.8 4.3

Composite, 2-1/2 inches ) 1.40 to 1.50 5.7 24.6 85.5 5.7

to 1/4 inch: 1.50 to 1.60 2.8 33.9 88.3 6.6

70.8 percent........ 1.60 to 1.70 2.0 42.8 90.3 7.4

1.70 to 1.80 1.8 51.2 92.1 8.2

Over 1.80 7.9 64.0 100.0 12.6

Under 1.30 58.9 1.7 58.9 1.7

1.30 to 1.40 19.8 9.1 78.7 3.6

Composite, 1/4 inch to 0: 1.40 to 1.50 4.3 23.0 83.0 4.6

29.2 percent......... ( 1.50 to 1.60 2.6 32.9 85.6 5.4

1.60 to 1.70 1.8 40.8 87.4 6.2

1.70 to 1.80 1.6 48.8 89.0 6.9

Over 1.80 11.0 70.1 100.0 13.9

Under 1.30 58.4 1.9 58.4 1.9

1.30 to 1.40 21.0 10.2 79.4 4.1

Composite, 2-1/2 inches 1.40 to 1.50 5.3 24.2 84.7 5.4

to 0: 1.50 to 1.60 2.8 33.6 87.5 6.3

100.0 percent....... 1.60 to 1.70 2.0 42.3 89.5 7.1

1.70 to 1.80 1.7 50.5 91.2 7.9

____Over 1.80 8.8 66.2 100.0 13.0

TABLE 9-A. - Specific-gravity analyses of coal from No. 7 bed,

upper bench. Evan Jones mine

I

Weightpercent

22.2

20.6

22.0

9.0

2.7

1.6

21.9

Ash,

percent

3.2

12.1

24.6

34.7

42.7

49.4

77.2

Cumula

Weightpercent

- - - - . -- - - - - . -

22.2

42.8

64.8

73.8

76.5

78.1

100.0

,tive

Ash,

percent

3.2

7.5

13.3

15.9

16.9

17.5

30.6
Size and weight

1 to 1/4 inch:

43.5 percent........

1/4 inch to 20-mesh:

35.7 percent........

20-mesh to 0:

6.0 percent.........

Composite, 2-1/2 inches

to 1/4 inch:

58.3 percent........

Composite, 1/4 inch to 0:

41.7 percent........

Under

1.30

1.40

1.50

1.60

1.70

Over

i

22

TABLE 9-A. - Specific-gravity analyses of coal from No. 7 bed.

upper bench, Evan Jones mine (Con.)

Under

1.30 1

1.40 1

1.50 1

1.60 1

1.70 1

Over

Under

1.30 1

1.40 1

1.50 1

1.60 1

1.70 1

Over

to

to

to

to

to

to

to

to

to

to

to

to

to

to

to

1.30

1.40

1.50

1.60

1.70

1.80

1.80

1.30

1.40

1.50

1.60

1.70

1.80

1.80

1.30

1.40

1.50

1.60

1.70

1.80

1.80

1.30

1.40

1.50

1.60

1.70

1.80

1.80

1;30

1.40

1.50

1.60

1.70

1.80

1.80

1.30

1.40

1.50

1.60

1.70

1.80

1.80

Specific

gravity

45.3

18.7

11.6

6.3

3.2

1.3

13.6

53.2

16.9

6.2

3.9

2.5

1.6

15.7

36.2

24.3

6.9

4.9

3.8

3.0

20.9

39.4

19.2

14.2

7.0

3.1

1.4

15.7

50.8

18.0

6.3

4.0

2.7

1.8

16.4

44.2

18.7

10.9

5.7

2.9

1.6

16.0

Weightpercent

2.6

11.7

25.2

35.3

43.7

50.7

77.3

1.9

9.0

23.2

33.5

42.4

49.7

79.8

3.8

10.5

21.7

31.5

39.8

46.9

73.4

2.7

11.8

25.0

35.1

43.5

50.3

77.3

2.1

9.3

23.0

33.2

41.9

49.0

78.6

2.4

10.8

24.5

34.5

42.9

49.7

77.8

Ash,

percent

Weight-

_percent

Under

1.30 to

1.40 to

1.50 to

1.60 to

1.70 to

Over

Under

1.30 to

1.40 to

1.50 to

1.60 to

1.70 to

Over

Under

1.30 to

1.40 to

1.50 to

1.60 to

1.70 to

Over

45.3

64.0

75.6

81.9

85.1

86.4

100.0

Cumulative

53.2

70.1

76.3

80.2

82.7

84.3

100.0

36.2

60.5

67.4

72.3

76.1

79.1

100.0

39.4

58.6

72.8

79.8

82.9

84.3

100.0

50.8

68.8

75.1

79.1

81.8

83.6

100.0

44.2

62.9

73.8

79.5

82.4

84.0

100.0

Ash,

percent

2.6

5.3

8.3

10.4

11.6

12.2

21.1

1.9

3.6

5.2

6.6

7.7

8.5

19.7

3.8

6.5

8.0

9.6

11.1

12.5

25.2

2.7

5.7

9.4

11.7

12.9

13.5

23.5

2.1

4.0

5.6

7.0

8.1

9.0

20.4

2.4

4.9

7.8

9.7

10.9

11.6

22.2

Composite,

to 0:

2-1/2 inches

100.0 percent.......

.~ . , . - - . - . - - . -== - -,, .

.. - -
Size and weight

2-1/2 inches to 1 inch:

17.7 percent........

1 to 1/4 inch:

44.1 percent........

1/4 inch to 20-mesh:

32.1 percent........

20-mesh to 0:

6.1 percent.........

Composite, 2-1/2 inches

to 1/4 inch:

61.8 percent ........

Composite, 1/4 inch to 0:

38.2 percent........

Under

1.30 to

1.40 to

1.50 to

1.60 to

1.70 to

Over

Under

1.30 to

1.40 to

1.50 to

1.60 to

1.70 to

Over

Under

1.30 to

1.40 to

1.50 to

1.60 to

1.70 to

Over

Under

1.30 to

1.40 to

1.50 to

1.60 to

1.70 to

Over

Under

1.30 to

1.40 to

1.50 to

1.60 to

1.70 to

Over

Under

1.30 to

1.40 to

1.50 to

1.60 to

1.70 to

Over

1.30

1.40

1.50

1.60

1.70

1.80

1.80

1.30

1.40

1.50

1.60

1.70

1.80

1.80

1.30

1.40

1.50

1.60

1.70

1.80

1.80

1.30

1.40

1.50

1.60

1.70

1.80

1.80

1.30

1.40

1.50

1.60

1.70

1.80

1.80

1.30

1.40

1.50

1.60

1.70

1.80

1.80

23

TABLE 10-A. - Specific-gravity analyses of coal from No. 7 bed,

lower bench, Evan Jones mine

Specific

gravity

20.2

20.5

11.1

9.1

10,3

6.9

21.9

46.3

17.2

7.1

6.2

5.3

4.4

13.5

56.1

14.5

5.3

3.8

3.6

3.2

13.5

35.0

28.2

5.9

4.7

3.8

3.6

18.8

38.8

18.2

8.3

7.0

6.7

5.1

15.9

52.7

16.7

5.4

4.0

3.6

3.3

14.3

Weightpercent

3.0

12.7

24.8

34.7

43.4

50.9

62.5

2.3

11.9

25.0

35.0

43.7

50.8

65.0

1.8

10.3

23.7

33.0

42.7

50.4

68.2

3.6

9.2

22.6

31.4

39.8

47.4

66.6

2.4

12.2

24.9

34.9

43.6

50.8

64.0

2.0

10.0

23.5

32.7

42.2

49.9

67.9

Ash,

percent

Cumulative TJTa -. * -4- _ A- U

20.2

40.7

51.8

60.9

71.2

78.1

100.0

46.3

63.5

70.6

76.8

82.1

86.5

100.0

percent

56.1

70.6

75.9

79.7

83.3

86.5

100.0

35.0

63.2

69.1

73.8

77.6

81.2

100.0

38.8

57.0

65.3

72.3

79.0

84.1

100.0

52.7

69.4

74.8

78.8

82.4

85.7

100.0

percent

3.0

7.9

11.5

15.0

19.1

21.9

30.8

2.3

4.9

6.9

9.2

11.4

13.4

20.4

1.8

3.5

5.0

6.3

7.9

9.4

17.4

3.6

6.1

7.5

9.0

10.5

12.2

22.4

2.4

5.5

8.0

10,6

13.4

15.7

23.3

2.0

3.9

5.3

6.7

8.3

9.9

18.2
Size and weight

2-1/2 inches to 1 inch:

21.6 percent........

1 to 1/4 inch:

48.4 percent........

1/4 inch to 20-mesh:

27.3 percent........

20-mesh to 0:

2.7 percent ........

Specific

gravity

Under

1.30 to

1.40 to

1.50 to

1.60 to

1.70 to

Over

Under

1.30 to

1.40 to

1.50 to

1.60 to

1.70 to

Over

Under

1.30 to

1.40 to

1.50 to

1.60 to

1.70 to

Over

Under

1.30 to

1.40 to

1.50 to

1.60 to

1.70 to

Over

1.30

1.40

1.50

1.60

1.70

1.80

1.80

1.30

1.40

1.50

1.60

1.70

1.80

1.80

1.30

1.40

1.50

1.60

1.70

1.80

1.80

1.30

1.40

1.50

1.60

1.70

1.80

1.80

24

TABLE 10-A. - Specific-gravity analyses of coal from No. 7 bed,

lower bench, Evan Jones mine (Con.)

Cumulative

Specific Weight- Ash, Weight- Ash,

Size and weight gravity percent percent percent percent

Under 1.30 44.1 2.2 44.1 2.2

Composite, 2-1/2 inches 1.30 to 1.40 17.6 11.4 61.7 4.8

to 0: 1.40 to 1.50 7.1 24.5 68.8 6.9

100.0 percent........ 1.50 to 1.60 5.9 34.3 74.7 9.0

1.60 to 1.70 5.6 43.2 80.3 11.4

1.70 to 1.80 4.4 50.6 84.7 13.4

O_____ver 1.80 15.3 65.4 100.0 21.4

TABLE 11-A. - Specific-jgravity analyses of coal from No. 7C bed,

Even Jones mine

Weightpercent

28.9

17.4

3.3

2.3

2.2

3.7

42.2

47.2

16.9

3.0

1.8

2.1

2.5

26.5

46.8

14.9

3.3

2.3

2.3

2.5

27.9

23.6

30.4

6.4

4.3

3.7

3.7

27.9

Ash,

percent

2.4

9.4

23.4

33.5

43.8

51.1

75.1

1.9

9.7

23.7

34.0

43.4

51.1

76.3

1.6

7.4

21.1

32.7

41.4

49.6

78.4

2.9

7.4

21.1

31.0

39.2

47.4

70.3

Cumulative

28.9

46.3

49.6

51.9

54.1

57.8

100.0

47.2

64.1

67.1

68.9

71.0

73.5

100.0

46.8

61.7

65.0

67.3

69.6

72.1

100.0

23.6

54.0

60.4

64.7

68.4

72.1

100.0

Weightpercent

2.4

5.0

6.3

7.5

8.9

11.6

38.4

1.9

4.0

4.8

5.6

6.7

8.2

26.3

1.6

3.0

3.9

4.9

6.1

7.6

27.4

2.9

5.4

7.1

8.7

10.3

12.2

28.4

Ash,

percent

L
I

Size and weight

2-1/2 inches to 1 inch:

25.6 percent........

1 to 1/2 inch:

20.3 percent........

Specific

gravity

. ---.-

Under

1.30 i

1.40 i

1.50 l

1.60 1

1.70 1

Over

Under

1.30 i

1.40 i

1.50 1

1.60 1

1.70 1

25

TABLE 11-A. - Specific-gravity analyses of coal from No. 7C bed,

Evan . = Jones - .mine - = (Con.) - {

Cumulative

Specific Weight- Ash, Weight- Ash,

Size and weight gravity percent percent percentpercen

Under 1.30 41.5 2.0 41.5 2.0

Composite, 2-1/2 inches 1.30 to 1.40 17.1 9.6 58.6 4.2

to 1/4 inch: 1.40 to 1.50 3.1 23.6 61.7 5.2

70.0 percent........ 1.50 to 1.60 2.0 33.8 63.7 6.1

1.60 to 1.70 2.1 43.5 65.8 7.3

1.70 to 1.80 2.9 51.1 68.7 9.1

Over 1.80 31.3 75.8 100.0 30.0

Under 1.30 44.7 1.7 44.7 1.7

1.30 to 1.40 16.3 7.4 61.0 3.2

Composite, 1/4 inch to 0: 1.40 to 1.50 3.6 21.1 64.6 4.2

30.0 percent ........ 1.50 to 1.60 2.5 32.4 67.1 5.3

1.60 to 1.70 2.4 41.1 69.5 6.5

1.70 to 1.80 2.6 49.3 72.1 8.0

Over 1.80 27.9 77.7 100.0 27.5

Under 1.30 42.5 1.9 42.5 1.9

Composite, 2-1/2 inches 1.30 to 1.40 16.9 9.0 59.4 3.9

to 0: 1.40 to 1.50 3.2 22.8 62.6 4.9

100.0 percent ....... 1.50 to 1.60 2.1 33.3 64.7 5.8

1.60 to 1.70 2.2 42.7 66.9 7.0

1.70 to 1.80 2.8 50.6 69.7 8.8

_____-_--.. -Over 1.80 30.3 76.3 100.0 29.2

TABLE 12-A. - Specific-gravity analyses of coal from Mrak mine

to

to

to

to

to

to

to

to

to

to

1.30

1.40

1.50

1.60

1.70

1.80

1.80

1.30

1.40

1.50

1.60

1.70

1.80

28.0

18.7

7.7

5.3

4.9

3.1

32.3

50.7

23.0

4.8

3.0

2.1

1.3

15.1

Weightpercent

4.5

13.1

25.0

33.4

41.0

51.3

68.0

4.2

13.2

26.1

35.9

44.3

51.2

73.3

Ash,

percent

Cumulative

28.0

46.7

54.4

59.7

64.6

67.7

100.0

50.7

73.7

78.5

81.5

83.6

84.9

100.0

WeightpercentAsh,

percent

4.5

7.9

10.4

12.4

14.6

16.3

33.0

4.2

7.0

8.2

9.2

10.1

10.7

Over 1.80 20.2
Size and weight

1/2 to 1/4 inch:

20.0 percent........

1/4 inch to 20-mesh:

24.7 percent........

20-mesh to 0:

9.4 percent.........

Composite, 2-1/2 inches

to 1/2 inch:

45.9 percent .......

Composite, 2-1/2 inches

to 1/4 inch:

65.9 percent........

Composite, 1/2 inch to 0:

54.1 percent........

- -

Specific

gravity

Under

1.30 to

1.40 to

1.50 to

1.60 to

1.70 to

Over

Under

1.30 to

1.40 to

1.50 to

1.60 to

1.70 to

Over

Under

1.30 to

1.40 to

1.50 to

1.60 to

1.70 to

Over

Under

1.30 to

1.40 to

1.50 to

1.60 to

1.70 to

Over

Under

1.30 to

1.40 to

1.50 to

1.60 to

1.70 to

Over

Under

1.30 to

1.40 to

1.50 to

1.60 to

1.70 to

Over

26

TABLE 12-A. - Specific-gravity analyses of coal from Mrak mine (Con.)

1.30

1.40

1.50

1.60

1.70

1.80

1.80

1.30

1.40

1.50

1.60

1.70

1.80

1.80

1.30

1.40

1.50

1.60

1.70

1.80

1.80

1.30

1.40

1.50

1.60

1.70

1.80

1.80

1.30

1.40

1.50

1.60

1.70

1.80

1.80

1.30

1.40

1.50

1.60

1.70

1.80

1,80

Weightpercent

63.6

17.3

3.0

2.1

1.4

1.1

11.5

61.8

12.5

3.2

1.8

1.5

1.3

17.9

29.4

24.0

7.5

3.6

2.8

2.7

30.0

38.0

20.6

6.4

4.3

3.7

2.3

24.7

45.8

19.6

5.4

3.6

3.0

1.9

20.7

56.8

16.3

3.9

2.2

1.7

1.5

17.6

Ash,

percent

3.6

12.8

25.7

35.5

43.9

51.5

76.7

2.9

12.1

23.4

34.4

42.3

48.8

79.6

4.2

10.5

22.8

33.1

41.0

47.7

73.5

4.3

13.1

25.4

34.2

41.8

51.3

69.4

4.0

13.1

25.4

34.4

42.1

51.3

70.7

3.3

12.0

23.9

34.4

42.4

49.2

77.1

Weightpercent

Cumulative

63.6

80.9

83.9

86.0

87.4

88.5

100.0

61.8

74.3

77.5

79.3

80.8

82.1

100.0

29.4

53.4

60.9

64.5

67.3

70.0

100.0

38.0

58.6

65.0

69.3

73.0

75.3

100.0

45.8

65.4

70.8

74.4

77.4

79.3

100.0

56.8

73.1

77.0

79.2

80.9

82.4

100.0

Ash,

percent

3.6

5.6

6.3

7.0

7.6

8.1

16.0

2.9

4.4

5.2

5.9

6.6

7.2

20.2

4.2

7.0

9.0

10.3

11.6

13.0

31.1

4.3

7.4

9.2

10.7

12.3

13.5

27.3

4.0

6.7

8.2

9.4

10.7

11.7

23.9

3.3

5.2

6.2

7.0

7.7

8.5

20.5
2-1/2 inches to 1 inct

45.9 percent.....

1 to 1/2 inch:

20.5 percent.....

I

Cumulative

Specific Weight- Ash, Weight- Ash,

Size and weight gravity percent percent percent percent

Under 1.30 52.9 3.1 52.9 3.1

1.30 to 1.40 15.7 11.4 68.6 5.0

Composite, 1/4 inch to 0: 1.40 to 1.50 4.4 23.1 73.0 6.1

34.1 percent........ 1.50 to 1.60 2.3 33.8 75.3 6.9

1.60 to 1.70 1.8 41.8 77.1 7.8

1.70 to 1.80 1.7 48.3 78.8 8.6

Over 1.80 21.2 77.2 100.0 23.2

Under 1.30 48.2 3.7 48.2 3.7

Composite, 2-1/2 inches 1.30 to 1.40 18.3 12.6 66.5 6.1

to 0: 1.40 to 1.50 5.0 24.7 71.5 7.4

100 percent ......... 1.50 to 1.60 3.2 34.3 74.7 8.6

1.60 to 1.70 2.6 42.0 77.3 9.7

1.70 to 1.80 1.8 50.4 79.1 10.6

_____Over 1.80 20.9 72.9 100.0 23.7

TABLE 13-A. - Specific-gravity analyses of coal from "A" bed, Premier mine

Specific

Size and weight gravity

27

TABLE 12-A. - Specific-gravity analyses of coal from Mrak mine (Con.)

Under

1.30 1

1.40

1.50

1.60

1.70

Over

)

)

)

)

I

I

I

1.30

1.40

1.50

1.60

1.70

1.80

1.80

1.30

1.40

1.50

1.60

1.70

1.80

1.80

1.30

1.40

1.50

1.60

1.70

1.80

1.80

Weightpercent

7.5

18.7

9.2

7.3

6.3

3.5

47.5

21.4

27.7

10.0

6.7

4.2

3.3

26.7

23.8

31.7

9.7

5.6

3.6

2.8

22.8

Ash,

percent

4.9

12.6

23.6

33.8

43.6

53.2

80.4

4.2

11.5

23.6

34.5

43.4

52.0

79.3

3.6

10.4

23.2

33.8

42.9

51.4

80.3

um.iil rAt-i v4

7.5

26.2

35.4

42.7

49.0

52.5

100.0

21.4

49.1

59.1

65.8

70.0

73.3

100.0

23.8

55.5

65.2

70.8

74.4

77.2

100.0

Weightpercent

4.9

10.4

13.8

17.2

20.6

22.8

50.2

4.2

8.3

10.9

13.3

15.1

16.8

33.5

3.6

7.5

9.8

11.7

13.2

14.6

29.6

Ash,

percent

1/2 to 1/4 inch:

13.1 percent........

Under

1.30 to

1.40 to

1.50 to

1.60 to

1.70 to

Over
Size and weight

1/4 inch to 20-mesh:

16.9 percent .......

20-mesh to 0:

3.6 percent .........

Composite,

to 0:

100.0

2-1/2 inches

percent.......

Under

1.30

1.40

1.50

1.60

1.70

Over

28

TABLE 13-A. - Specific-gravity analyses of coal from "A" bed,

Premier mine (Con.)

Under

1.30 l

1.40 l

1.50 1

1.60 i

1.70 1

Over

Under

1.30 l

1.40 1

1.50 1

1.60 1

1.70 1

Over

Under

1.30 1

1.40 1

1.50 1

1.60 1

1.70 1

Over

I

I

I

to

to

to

to

to

to

to

to

to

to

to

to

to

to

to

to

to

to

to

to

Specific

gravity

1.30

1.40

1.50

1.60

1.70

1.80

1.80

1.30

1.40

1.50

1.60

1.70

1.80

1.80

1.30

1.40

1.50

1.60

1.70

1.80

1.80

1.30

1.40

1.50

1.60

1.70

1.80

1.80

1.30

1.40

1.50

1.60

1.70

1.80

1.80

Weightpercent

23.6

27.8

8.1

4.8

3.1

2.5

30.1

8.2

29.8

7.2

3.9

3.5

3.0

44.4

15.2

24.2

9.2

6.4

4.9

3.2

36.9

13.8

23.2

9.5

6.8

5.3

3.3

38.1

20.9

28.1

8.0

4.6

3.2

2.6

32.6

3.4

7.7

20.4

29.3

37.0

44.5

75.1

3.9

11.0

23.1

33.5

42.9

51.9

80.0

4.2

11.8

23.5

34.0

43.5

52.6

80.2

3.0

8.4

21.1

30.7

39.2

47.9

79.2

Ash,

percent

3.0

8.5

21.2

30.9

39.7

48.8

80.5

Weightpercent

Cumulative

23.6

51.4

59.5

64.3

67.4

69.9

100.0

8.2

38.0

45.2

49.1

52.6

55.6

100.0

15.2

39.4

48.6

55.0

59.9

63.1

100.0

13.8

37.0

46.5

53.3

58.6

61.9

100.0

20.9

49.0

57.0

61.6

64.8

67.4

100.0

Ash,

percent

3.0

6.0

8.0

9.8

11.1

12.5

33.0

3.4

6.8

8.9

10.6

12.3

14.1

41.2

3.9

8.3

11.1

13.7

16.1

17.9

40.8

4.2

9.0

11.9

14.7

17.4

19.2

42.5

3.0

6.1

8.2

9.9

11.3

12.7

34.4

Composite, 2-1/2 inches

to 1/4 inch:

79.5 percent........

Composite, 1/4 inch to 0:

20.5 percent........

Under

1.30 to

1.40 to

1.50 to

1.60 to

1.70 to

Over i i .- . - - m , N - i - . . . -

- . - . - -
Size and weight

2-1/2 inches to 1 inch:

44.8 percent........

1 to 1/2 inch:

20.8 percent........

1/2 to 1/4 inch:

13.2 percent........

1/4 inch to 20-mesh:

16.9 percent........

Specific

gravity

Under

1.30 to

1.40 to

1.50 to

1.60 to

1.70 to

Over

Under

1.30 to

1.40 to

1.50 to

1.60 to

1.70 to

Over

Under

1.30 to

1.40 to

1.50 to

1.60 to

1.70 to

Over

Under

1.30 to

1.40 to

1.50 to

1.60 to

1.70 to

Over

Under

1.30 to

1.40 to

1.50 to

1.60 to

1.70 to

Over

1.30

1.40

1.50

1.60

1.70

1.80

1.80

1.30

1.40

1.50

1.60

1.70

1.80

1.80

1.30

1.40

1.50

1.60

1.70

1.80

1.80

1.30

1.40

1.50

1.60

1.70

1.80

1.80

1.30

1.40

1.50

1.60

1.70

1.80

1.80

1.30

1.40

1.50

1.60

1.70

1.80

1.80

29

TABLE 14-A. - Specific-gravity analyses of coal from "C" bed,

Premier mine

Weightpercent

4.5

16.3

8.3

12.0

9.8

7.9

41.2

8.8

22.1

9.7

12.0

9.7

5.6

32.1

13.1

22.5

9.4

9.0

8.9

6.0

31.1

16.2

22.7

7.7

6.7

7.1

4.6

35.0

2.3

24.3

9.0

5.6

5.2

5.5

48.1

8.4

19.8

8.7

10.4

9.0

6.5

37.2

Ash

percent

3.5

9.3

22.8

33.5

43.3

51.8

76.6

3.4

9.4

23.0

34.2

43.2

52.1

76.8

3.1

9.2

23.6

34.4

43.3

51.6

75.4

2.6

8.2

22.6

33.3

42.4

50.3

74.7

3.3

8.0

19.5

30.1

39.7

45.1

71.5

3.1

9.0

22.8

33.7

43.1

51.4

75.9

Weightpercent

Cumulative

4.5

20.8

29.1

41.1

50.9

58.8

100.0

8.8

30.9

40.6

52.6

62.3

67.9

100.0

13.1

35.6

45.0

54.0

62.9

68.9

100.0

16.2

38.9

46.6

53.3

60.4

65.0

100.0

2.3

26.6

35.6

41.2

46.4

51.9

100.0

8.4

28.2

36.9

47.3

56.3

62.8

100.0

Ash,

percent

3.5

8.0

12.3

18.5

23.2

27.1

47.5

3.4

7.7

11.3

16.6

20.7

23.3

40.5

3.1

7.0

10.4

14.4

18.5

21.4

38.2

2.6

5.9

8.6

11.7

15.3

17.8

37.7

3.3

7.6

10.6

13.3

16.2

19.3

44.4

3.1

7.2

10.9

15.9

20.3

23.5

43.0

I

20-mesh to 0:

4.3 percent.........

Composite, 2-1/2 inches

to 0:

100.0 percent.......

Under

1.30 to

1.40 to

1.50 to

1.60 to

1.70 to

Over
30

Size and weight

2-1/2 inches to 1 inch:

29.0 percent .........

1 to 1/2 inch:

25.2 percent.........

1/2 to 1/4 inch:

16.4 percent .........

Specific

gravity

Under

1.30 to

1.40 to

1.50 to

1.60 to

1.70 to

Over

Under

1.30 to

1.40 to

1.50 to

1.60 to

1.70 to

Over

Under

1.30 to

1.40 to

1.50 to

1.60 to

1.70 to

Over

1.30

1.40

1.50

1.60

1.70

1.80

1.80

1.30

1.40

1.50

1.60

1.70

1.80

1.80

1.30

1.40

1.50

1.60

1.70

1.80

1.80

TABLE 14-A. - Specific-gravity analyses of coal from "C" bed,

Premier mine (Con.)

Cumulative

Specific Weight- Ash, Weight- Ash,

Size and weight gravity percent percent percent percent

Under 1.30 7.1 3.4 7.1 3.4

Composite, 2-1/2 inches 1.30 to 1.40 18.9 9.3 26.0 7.7

to 1/4 inch: 1.40 to 1.50 8.8 23.0 34.8 11.6

78.8 percent......... 1.50 to 1.60 11.5 33.8 46.3 17.1

1.60 to 1.70 9.6 43.3 55.9 21.6

1.70 to 1.80 7.0 51.8 62.9 24.9

Over 1.80 37.1 76.4 100.0 44.0

Under 1.30 13.4 2.7 13.4 2.7

1.30 to 1.40 23.0 8.2 36.4 6.2

Composite, 1/4 inch to 0: 1.40 to 1.50 8.0 22.0 44.4 9.0

21.2 percent....... * 1.50 to 1.60 6.4 32.6 50.8 12.0

1.60 to 1.70 6.7 41.8 57.5 15.5

1.70 to 1.80 4.8 49.2 62.3 18.1

Over 1.80 37.7 74.0 100.0 39.2

TABLE 15-A. - Specific-gravity analyses of coal from No. 2 bed,

Premier mine

Weightpercent

14.8

9.2

7.3

9.3

8.6

8.7

42.1

21.5

10.2

4.5

4.4

3.7

3.7

52.0

35.6

13.0

4.8

3.7

3.2

3.2

36.5

Ash,

percent

2.7

12.0

25.2

35.1

44.4

52.4

78.5

2.7

11.0

25.1

34.9

43.9

51.9

77.5

2.3

10.4

24.4

34.0

43.5

51.3

76.5

Cumula

Weightpercent

riv

14.8

24.0

31.3

40.6

49.2

57.9

100.0

21.5

31.7

36.2

40.6

44.3

48.0

100.0

35.6

48.6

53.4

57.1

60.3

63.5

100.0

:ive

Ash,

percent

2.7

6.3

10.7

16.3

21.2

25.9

48.0

2.7

5.4

7.8

10.8

13.5

16.5

48.2

2.3

4.5

6.3

8.1

9.9

12.0

35.6
Size and weight

1/4 inch to 20-mesh:

24.3 percent.........

f

20-mesh to 0:

5.1 percent..........

Composite, 2-1/2 inches

to 0:

100.0 percent........

Composite, 2-1/2 inches

to 1/4 inch:

70.6 percent.........

Composite, 1/4 inch to 0:

29.4 percent ........

. - . .

.

31

TABLE 15-A. - Specific gravity analyses of coal from No. 2 bed,

Premier mine (Con.)

Under

1.30

1.40

1.50

1.60

1.70

Over

Under

1.30

1.40

1.50

1.60

1.70

Over

Under

1.30

1.40

1.50

1.60

1.70

Over

Under

1.30

1.40

1.50

1.60

1.70

Over

1.40

1.50

1.60

1.70

Over

to

to

to

to

to

to

to

to

to

to

to

to

to

to

to

to

to

to

to

to

to

to

to

to

to

Specific

_ gravity

1.30

1.40

1.50

1.60

1.70

1.80

1.80

1.30

1.40

1.50

1.60

1.70

1.80

1.80

1.30

1.40

1.50

1.60

1.70

1.80

1.80

1.30

1.40

1.50

1.60

1.70

1.80

1.80

1.30

1.40

1.50

1.60

1.70

1.80

1.80

38.1

15.0

3.7

2.9

2.7

2.3

35.3

19.5

25.7

5.8

3.8

3.2

2.8

39.2

25.8

12.3

5.2

5.3

4.8

4.7

41.9

22.0

10.4

5.7

6.3

5.6

5.6

44.4

34.8

16.9

4.1

3.0

2.8

2.4

36.0

Weightpercent

2.0

8.5

23.3

33.1

42.2

48.8

77.4

2.6

7.9

20.9

32.2

34.3

46.7

75.4

2.4

10.4

24.4

34.2

43.1

50.9

77.5

2.5

11.3

25.0

34.8

44.0

52.0

77.7

2.1

8.4

22.9

32.9

40.8

48.4

77.1

Ash,

percent

Weightpercent

Cumulative

38.1

53.1

56.8

59.7

62.4

64.7

100.0

19.5

45.2

51.0

54.8

58.0

60.8

100.0

25.8

38.1

43.3

48.6

53.4

58.1

100.0

22.0

32.4

38.1

44.4

50.0

55.6

100.0

34.8

51.7

55.8

58.8

61.6

64.0

100.0

Ash,

percent

2.0

3.8

5.1

6.5

8.0

9.5

33.4

2.6

5.6

7.4

9.1

10.5

12.1

36.9

2.4

5.1

7.4

10.3

13.2

16.3

41.9

2.5

5.4

8.3

12.1

15.7

19.3

45.2

2.1

4.2

5.5

6.9

8,5

10.0

34.1
Size and weight

2-1/2 inches to 1 inch:

46.3 percent.........

1 to 1/2 inch:

15.4 percent.........

1/2 to 1/4 inch:

12.9 percent..........

1/4 inch to 20-mesh:

19.7 percent.........

20-mesh to 0:

5.7 percent..........

Specific

gravity

Under

1.30 1

1.40 i

1.50 1

1.60 i

1.70 1

Over

to

to

to

to

to

32

TABLE 16-A. - Specific-gravity analyses of coal from No. 4 bed,

Premier mine

Under

1.30 to

1.40 to

1.50 to

1.60 to

1.70 to

Over

Under

1.30 to

1.40 to

1.50 to

1.60 to

1.70 to

Over

Under

1.30 to

1.40 to

1.50 to

1.60 to

1.70 to

Over

Under

1.30 to

1.40 to

1.50 to

1.60 to

1.70 to

Over

1.30

1.40

1.50

1.60

1.70

1.80

1.80

1.30

1.40

1.50

1.60

1.70

1.80

1.80

1.30

1.40

1.50

1.60

1.70

1.80

1.80

1.30

1.40

1.50

1.60

1.70

1.80

1.80

1.30

1.40

1.50

1.60

1.70

1.80

1.80

Weightpercent

4.2

3.5

3.5

3.8

4.1

2.9

78.0

21.9

13.7

7.0

7.4

5.9

4.6

39.5

33.2

14.1

5.4

4.2

3.5

2.9

36.7

37.1

17.0

4.1

3.0

2.8

2.2

33.8

8.4

22.7

5.7

3.3

2.3

1.7

Ash,

_percent

2.4

11.6

25.7

35.8

43.5

52.3

76.5

2.5

10.8

25.2

35.5

44.6

51.5

77.2

2.2

9.8

24.7

34.5

43.5

51.1

80.0

1.9

7.9

22.8

33.1

42.4

47.6

81.4

2.9

7.4

19.9

30.7

40.1

46.4

80.9

4.2

7.7

11.2

15.0

19.1

22.0

100.0

21.9

35.6

42.6

50.0

55.9

60.5

100.0

33.2

47.3

52.7

56.9

60.4

63.3

100.0

37.1

54.1

58.2

61.2

64.0

66.2

100.0

8.4

31.1

36.8

40.1

42.4

44.1

100.0

Weightpercent

2.4

6.6

12.6

18.4

23.8

27.6

65.7

2.5

5.7

8.9

12.8

16.2

18.9

41.9

2.2

4.5

6.5

8.6

10.6

12.5

37.3

1.9

3.8

5.1

6.5

8.1

9.4

33.7

2.9

6.2

8.3

10.2

11.8

13.1

51.0

Ash,

percent

Cumulative

55.9
33

TABLE 16-A. - Specific-gravity analyses of coal from No. 4 bed,

Premier mine (Con.)

Cumulative

Specific Weight- Ash, Weight- Ash,

Size and weight gravity percent percent percent percent

Under 1.30 17.4 2.2 17.4 2.2

Composite, 2-1/2 inches 1.30 to 1.40 10.2 9.4 27.6 4.9

to 0: 1.40 to 1.50 4.5 24.5 32.1 7.6

100.0 percent........ 1.50 to 1.60 4.2 34.9 36.3 10.8

1.60 to 1.70 3.9 43.5 40.2 13.9

1.70 to 1.80 3.0 51.1 43.2 16.5

Over 1.80 56.8 77.7 100.0 51.3

Under 1.30 12.9 2.3 12.9 2.3

Composite, 2-1/2 inches 1.30 to 1.40 7.4 11.1 20.3 5.5

to 1/4 inch: 1.40 to 1.50 4.6 25.4 24.9 9.2

74.6 percent ......... 1.50 to 1.60 4.6 35.5 29.5 13.3

1.60 to 1.70 4.4 43.7 33.9 17.2

1.70 to 1.80 3.2 51.9 37.1 20.2

Over 1.80 62.9 77.3 100.0 56.1

Under 1.30 30.6 2.1 30.6 2.1

1.30 to 1.40 18.3 7.8 48.9 4.2

Composite, 1/4 inch to 0: 1.40 to 1.50 4.4 22.1 53.3 5.7

25.4 percent......... 1.50 to 1.60 3.1 32.6 56.4 7.2

1.60 to 1.70 2.7 41.9 59.1 8.8

1.70 to 1.80 2.1 47.3 61.2 10.1

Over 1.80 38.8 81.3 100.0 37.7

INT. u BU.OF MINES.PG I. PA 39 1 2