Coal seams are at various elevations in the mountains. Some coal
seams need to be accessed by a shaft which is very deep and some coal seams
are easily accessed by stripping the mountain side to expose the coal seam.
This
picture shows stripping of the mountain side to expose a coal seam.
The
coal seam has been exposed and the mining process is ready to begin.
This
is a mine in operation which shows the supply track and conveyor belt.
The track is used for hauling supplies and workers underground. The
conveyor belt transports the coal from the working area underground to
the outside stockpile.
Underground
view of the track and conveyor belt heading.
Power
distribution center - Most mining equipment underground uses electricity
to operate. A high voltage cable runs from outside the mine to the
underground distribution center, and from there individual cables go to
various pieces of mining equipment.
This
conventional way of mining drills holes in the coal. Explosives are
placed in the holes and ignited in order to break up the coal.
This
continuous mining machine is a more productive way to remove coal from
an underground coal mine. A continuous miner cuts and loads the coal
into haulage equipment which transports the coal to a loading point at
the conveyor belt.
This
shuttle car is one type of coal haulage machinery presently used.
After
the coal is removed from a heading, this roof bolting machine installs
roof supports by drilling the rock and inserting either conventional or
resin roof bolts. These bolts tie the roof strata together to control
roof falls. This is considered the most dangerous job in the coal
mines.
This operator is drilling a hole in the roof for the roof bolt.
This
operator is installing a roof bolt into a previously drilled hole.
After
coal has been cut and the roof supported, the utility man cleans up loose
coal and applies rock dust to the coal wall to limit coal dust explosion
hazards. He then hangs curtain to ventilate the working area.
This
scoop is used to pick-up loose coal from the mine floor after the mining
process.
All
mining equipment uses hydraulics and electrical motors to operate.
A mechanic is always available for repairs.
This
mechanic is dreaming of working on the #24 car!
After
the coal mine has advanced to the mine limit - pillars, or blocks of coal
that support the top, are extracted as the mining process retreats.
Temporary wood supports, timbers, are used while removing the pillars.
This is probably the most dangerous part of the underground mining process.
The timbers are used to support loose rock and as warning signals as the
main top settles. This area is never entered again.
Lunch time in an underground coal mine.
NO MCDONALDS IN SIGHT!
Coal
mining is governed by state and federal laws that involve much paperwork.
All aspects of the mining process are recorded daily (ex. methane checks,
oxygen content, air velocity readings).