The Calumet news. [volume] (Calumet, Mich.) 1907-1938, 1910-08-02
RAPID PROGRESS
MADE AT miami
WITH AIR COMPRESSOR AGAIN
WORKING, DEVELOPMENT
WORK is BEING vIGoR-
ouSLY PUSHED

Development work at Miami mine
will again approach the lO00-foot mark
this week The curtailment OF drifting
during the previous week was due
principally To the air compressor at No,
shaft being somewhat out Of COM
mission. This work is being done
chiefly on the 42O and $40 foot haulage
levels and all the sub levels and work
ing levels up to the 270- foot level De-
velopment is being done under con-
.ract OF Sl.25 a foot for drilling. The
drills used are OF lngersoll- Rand make
and some Sullivan drills of the same
size are in use. These, OF course. are
one-man drills and at the present
scale OF wages contractor can make
good money by drilling two rounds I'm
a shift Mucking Training and tim
bering amounts 10 about $3.50 more
foot.
The main shaft, which Is sunk off
the ore body in the ella conglomerate
is now down 20 the 720 foot level. II
measures II by l6 feet in the clear
and has four compartments. Three
are two skip ways. placed side by side
the narrow way OF the shaft and each
OF these is nfty-fve by hfty-five feet
I'm the clear, and is designed To ac-
comodate two seventy-fve ton sklps
run In balance. Back OF the skipways
and Jagged off from them is a COM
partment extending the entire width
OF the shaft and measuring six by
twelve feet i'm the clear. In this a
s-fs.s
is such that tlmbers can be lowered
on trucks and can be wheeled direct
~ off the cage and into AMI particular
drift or cross drift. Haulage Is to be
accomplished on the 420-f foot level by
two slx-and- one half-ton electric loco
motives capable OF hauling a flfty-ton |
train. Curves are put in on 23foot |
radii and should give ample room.
Drifts are timbered with eight by eight |
inches sets places as far apart as the
nature OF the ground demands.
The shaft is timbered with twelve
by twelve inch creosoted, timbers
framed and impregnated with the oil
in Fl Paso.
At present. there are being installed
at the power house three 60O-horse-
power boilers with space for a fourth
II necessary. They are Of a new type
manufactured by the Edgemore Iron
works at wilmington, Delaware. They
are built on the same principal as the
Il. 4 w, or Sterling boiler. There Is
a front and back header into which |
are fitted 800 three-inch pipes. These |
headers have small hand holes I'm front /
of each pipe for cleansing purposes |
and feed into the horizontal drums.
From the front and back headers
steam issues from a three-inch pipe
and passes back over the combustion
chamber TO the superheated to about
3f2 degrees. The draft is natural and
flue connections are managed by means
OF large concrete conduits AT the
base Of each boiler is built large
open flue which can be connected d.
rectly with the chimney or shut off so
the gases from the combustion chamber
will be forced to pass up over econ
omizer, and thence down, into the big
chimney. The gases pass over three
sets OF battle plates and the boilers
will. for the present, burn oil. 1t was
determined with the Bakersville oil
used that nearly seventeen pounds Of
water could be evaporated for each
pound Of oil burned while with the
best coal at hand the evaporation did
not exceed twelve and one half pounds
OF water per pound of fuel The wa
ter Is 10 be heated in the feed water
heaters to 100 degrees Fahrenheit. In
front Of the battery runs a long pit
some four feet wide by five feet deep.
designed for the installation Of a belt
ronveyor should II become necessary
To use coal at any time. This conveyor
could be used. not only for taking
ashes from the pits. but also 90 bring
coal into the boiler room. In this case
some sort Of an automatic feeder
would In all probability be installed.
The boilers are TO be fed by pumps.
which at first are 10 be installed in
the western end OF the boiler house.
The stack which is already landmark
for many miles around, is said to have
cost the Miami Copper company some
$4,000. 1t Is 2i0 feet In height, Is
lined with twenty-five inches Of fire.
bricks. covered with eighteen inches |
of concrete, at the base, and tapers |
from an inside dimension of eighteen |
feet. four inches at the bottom to II |
feet at the top. 1t is reinforced by two |
sets of steel rods on the inside