TILER #1 MINE

Vacuum Drilling

Noise M CATE

Drill Plan

Mine Height 4 ft.
Coal Seam 32 to 40 inches

80ft. X 80 ft. \A 80ft. X 80 ft.
xX X X X
Mist Drilling xX X X X
Noise Measurement
X = Drill Holes 19 ft.
One
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URETHANE COATING COMPOUND PO-650#/ COLOR TAN

USE MOLD No. 100168056

100204628

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Reverberation Chamber

Wioy Chain J oy Chain
Ricoto (Coated)
NSound Power: 118)/dB(A) Sound Power: ua dB(A)

Sound Power reduction of 7 dB(A)__



Evaluation

* Two Fletcher Roof Ranger II-13 roof bolting
machines

- One with standard dual boom setup for vacuum
drilling

- One with standard dual boom setup for wet drilling
with a Joy mist System

¢ Drilling

- Hole depth 5 ft

- 1 in. bits

- 3 ft round drill steel starter, then two 3 ft hex drill
steel to finish.

- Rotation & Thrust - Max?
—
coc MOSH



Standard RRII (Vacuum) Standard RRII

(Mist System)
Hole depth = 60 in. Hole depth = 60 in.
Drilling Time = 56 sec. Drilling Time = 51 sec

Penetration Rate = 1.07 in/sec | Penetration Rate = 1.18 in/sec

Dose per hole = .9% per hole | Dose per hole = .6% per hole

Number holes / Allowable Number holes / Allowable
Exposure = 112 holes Exposure = 162 holes

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CDC] [MOSH


Mist Controller

JOY MIST SYSYEM



Mist System Specification

e Air
- Flow: 20 cfm
- Pressure: 110 psi

e Water
- Flow: 1 gal/min
- Pressure: 110 psi
- Water Tank: 180
gal
¢ Operation

- Air & Water
pressures drop to
96 psi.

TAC.
CDC]

[MOSH


DIFFERENCE BETWEEN
30 INCH UNCOATED FLIGHT BARS &
COATED FLIGHT BARS
ENLOW FORK

. oo
Xe / ae. |
(2) iat
A
to é 7 6 5 4 3 2 1 0 -t
Cro if X (meters)

Y (meters)

01/24/04 dB(A)


For more information

Peter G. Kovalchik

Phone: 412-386-6098 Fax: 412-386-4864
pdkO@cdc.gov
www.cdc.gov/niosh/mining

paneer
CDC} Pittsburgh Research Laboratory "IOSH


30 INCH UNCOATED FLIGHT BARS
ENLOW FORK

Crosscut X (meters)

80 85 90 95 100 105 110

01/24/04 dB(A)


01/24/04



TILER #1 MINE

Mine Height 4 ft.
Coal Seam 32 to 40 inches
B C D E

80ft. X80 ft. 80ft. X80 ft. 80ft. X80 ft. 80ft. X80 ft. 80ft. X80 ft. 80ft. X80 ft.

id > at
19 ft. 19 ft. 19 ft. 19 ft. 19 ft.
°
80ft. X80 ft. 80ft. X80 ft. 80ft. X80 ft. 80ft. X80 ft. 80ft. X80 ft. 80ft. X80 ft.
19 ft. {19 ft. 19 ft. 19 ft. 19 ft.

80ft. X80 ft. 80ft. X80 ft. 80ft. X80 ft.

80ft. X80 ft. 80ft. X80 ft. 80ft. X80 ft.

wg IMOSH

Mile

M


30 INCH COATED FLIGHT BARS

le ENLOW FORK
? stars)

Crosscut

95 100 105 110

T
xD —
80 85 90

01/24/04 dB(A)


Summary - Underground Sound

Pressure Measurements
Roof Bolting Standard Standard
Machine RRI| RRII (Mist
Operation (Vacuum) System)
dB(A) dB(A)
Idling 82 82
Mist System
turned on, No NA 88
drilling
Drilling 101 99

CDC

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[MOSH



Development and
Assessment of Controls
Session

Coated Flight Bars & Mist System

Peter G. Kovalchik

Mining Hearing Loss Prevention Workshop
June 21-22, 2005

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CDC} Pittsburgh Research Laboratory IMIOSH


The shift production data from
‘1/24 to 2/09 was 22 shifts with _
02/09/04 12,500 tons mined.



Coated
Chain

Chain

Sound NIOSH
Pressure MSHA Dose Dose MSHA | NIOSH
Level dB(A) (%) (%) Hours | Hours
80 25.0 31.5| 32.00] 25.40
82 33.0 50.0| 24.25 16.00
85 50.0 100.0 16.00 8.00
88 75.8 200.0 10.56 4.00
90 100.0 317.5 8.00 2.52
91 114.9 400.0 6.96 2.00
94 174.1 800.0 4.59 1.00
95 200.0 | 1,007.9 4.00 0.79
96 229.7| 1,269.9 3.48 63
97 263.9| 1,600.0 3.03 0.50
98 303.1| 2,015.9 2.64 4
99 348.2| 2,539.8 2.3 31
100 400.0| 3,200.0 2.00 0.25
101 459.5| 4,031.7 1.74 2
tncoate aoa] 527.8 5,079.7] 1.82|  0.16|
103 606.3| 6,400.0 1.32 13
104 696.4| 8,063.5 1.15 0.10
105 800.0 | 10,159.4 1 .08
106 919.0 | 12,800.0 0.87 0.06 \OSH

HC
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COATED C

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—
—

ROOF RANGER I1-13.

Fletcher’s Number one seller
approximately 1,281 sold in last 40 years



TAC.
CDC]

Less water than wet drilling


Polyurethane C oating
(PO-650)

* Chain flight bars were coated with a
durable polyurethane damping
material.

* Objectives:
¢ Minimize impact noise
* Minimize scrapping noise

C.U.E. Inc.
11 Leonberg Road
PROPERTIES Cranberry Township, Pa. 16066-3601
OO . U.S.A.
¢ Polyurethane Material - (PO-650) Phone 724-772-5225
¢ Durometer - 84A Fax 724-772-5280

. Web: www.cue-inc.com
« Compression Set - 45% max.

¢ Ultimate Tensile Strength - 6000 psi

pape Note: Mention of specific brands does not imply endorsement

We eX

UDC

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paneer

UD

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JUS Wi 224-REHRHART. . .

aff

36"
OVERALL
WIDTH

7705012235-0000

SL CONNECTING LINK

Sey
rn al ¥ \
COATED FLIGHT ]
BAR ASSEMBLY
SCALE 0,250 on. 2”
- PACKAGE NUMBER OF LENGTH
— 13" FLIGHT SPACING NUMBER | FLIGHT SECTIONS
NOTES
THIS CHAIN HAS DIRT RELIEF UNIVERSALS.
CHAIN CAN BE SHORTENED 6.5 INCHES MINUMUM BY 1oo201770 1s i
I. REMOVING ONE FLIGHT SECTION (3 PITCHES)
2. ADDING ONE 01451898-0000 ROLLER LINK (1 PITCH)
eo =r re rome ree rien EH ETI _ E a a 2 in Tragye, AE
wit ae 1: oor a on se ce | a ee Te abet 1/4 Fates war weasat conveoe cvain
ce » ats 7 fe BY PT THT | pacence ano" ASSEMBLY. nST#UCT 1H
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Mist Drilling System



Coated Flight Bars



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Sound NIOSH
Pressure MSHA Dose Dose | MSHA | NIOSH
Level dB(A) (%) (%) Hours | Hours

80 25.0 31.5 32.00 25.40
82 33.0 50.0 24.25 16.00
85 50.0 100.0 16.00 8.00
88 75.8 200.0 10.56 4.00
90 100.0 317.5 8.00 2.52
91 114.9 400.0 6.96 2.00
94 174.1 800.0 4.59 1.00
95 200.0 1,007.9 4.00 0.79
96 229.7 1,269.9 3.48 63
97 263.9 1,600.0 3.03 0.50
98 303.1 2,015.9 2.64 4
99 348.2 2,539.8 2.3 31

100 400.0 3,200.0 2.00 0.25

[to] as9.5] ao3a7] aa] 2)

102 527.8 5,079.7 1.52 0.16

103 606.3 6,400.0 1.32 13

104 696.4 8,063.5 1.15 0.10

105 800.0 | 10,159.4 1 .08

106 919.0 | 12,800.0 0.87

0.06 INI


Collaborators

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KENNAMETAL

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WW A.

AMERICAN RESOURCE



Summary

e Promising noise controls on MSHA
Program Information Bulletin PO4-18

e Longer bit life
e Less water

Allowable Exposure Time was
Increased

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CDC] [MOSH


98 dB(A) at Tail

The shift production data from
1/24 to 7/16 was 164 shifts with
74,826 t tons mined.



Summary

Sound Power Reduction of 7 dB(A)

e Underground Sound Level Reduction of 4
dB(A)

¢ Durability - Minimal Wear after 6 months
mainly on the tips)

e Longer Chain Life

Allowable Exposure Time was Increased
by 1 Hour

Promising noise controls on MSHA
Program Information Bulletin PO4-18

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CDC] [MOSH