Report of the Bureau of Mines of the Department of Internal Affairs of ...

404 xiEPORT OF THE INSPECTORS OF MINES. Off. Doc.
miiiute, which was equal to the requirement for the number of persons
employed therein, and the quantity of air i)assing at the outlet was
81,500 cubic feet per minute. The double and treble entry systems of
working are adopted in the development of this coal held, and the air
currents are taken into the mine from inlet shafts near the face of the
workings; by this method, many difficulties are removed and the
matter of ventilation is much simplified. The coal is mined by hand
labor. Haulage is done partly by two steam locomotives and partly
by the head line system. A 25-foot Vulcan fan is used to produce ventilation.
Venture.—At the time of my last visit some of the roadways were
very wet and muddy, but all other conditions were passable. There
were 30,000 cubic feet of air passing at the outlet, and the quantity
passing in the ditierent entries varied from 5,000 to 10,000 cubic feet
per minute. The mine is worked by the double entry system and the
coal is mined by hand labor. The head and tail rope system is used
to haul the coal from the mine. A 20-foot Vulcan fan produces the
ventilation.
Fox.—The general condition of this mine is reasonably good. About
thirty men only are employed. The product is used principally
for domestic purposes in the city of Pittsburg. The mine is worked
on the single entry system. The coal is mined by hand labor and the
head rope system of haulage is in use. The ventilation is produced
by a 10-foot fan of the Guibal type. Quantity of air passing at the
outlet, when last examined, measured 15,000 cubic feet, and 8,000
cubic feet was measured near the face of the entries.
Mines on the Pittsburgh, Cincinnati, Chicago and St. Louis Railroad.
Idlewood.—During the early part of the year the condition of this
mine was unsatisfactory. The roadways were wet and muddy. The
refuge holes were obstructed by dirt and slate, and the ventilation
was not properly conducted to the face of the workings, but at the
time of my last visit, the conditions were very much improved in all
res])ects. Quantity of air at outlet, when last measured, was 10,400
cubic feet per minute, and 5,000 cubic feet was measured near the
face of the entries. The cokI is mined by hand labor, and the sys(en>
of haulage is by animal power. A small furnace is used lo j>ro
duce th(> ventilation, but I have freipiently found llif furnace lire
neglected and llie workings short of air.
(riant.—This mine is worked on the double entry system.
Tlie coal
is mined by hand labor and it is hauled from the mine by animal
power. The ventilation is jiroduced by a small furnace, which was
passing 13,000 cubic feet of air per minute when last measured, and
about 3,600 cubic feet was i)assing near the face of each butt entry.
The roadways are wet and muddy, and the condition of the mine is
anything but good.