People also ask
What are the parts of a coal mining block?
P Panel- A coal mining block that generally comprises one operating unit. Panic bar- A switch, in the shape of a bar, used to cut off power at the machine in case of an emergency. Parting- (1) A small joint in coal or rock; (2) a layer of rock in a coal seam; (3) a side track or turnout in a haulage road.
What is MSHA in coal mining?
MSHA- Mine Safety and Health Administration; the federal agency which regulates coal mine health and safety. Mud cap- A charge of high explosive fired in contact with the surface of a rock after being covered with a quantity of wet mud, wet earth, or sand, without any borehole being used.
What is a coal pillar in a mine?
Pillar- An area of coal left to support the overlying strata in a mine; sometimes left permanently to support surface structures. Pillar robbing- The systematic removal of the coal pillars between rooms or chambers to regulate the subsidence of the roof.
How does a coal miner remove coal?
Employs a steal plow, or rotation drum, which is pulled mechanically back and forth across a face of coal that is usually several hundred feet long. The loosened coal falls onto a conveyor for removal from the mine. Loose coal- Coal fragments larger in size than coal dust. Low voltage- Up to and including 660 volts by federal standards. M