- Industry: Mining
- Number of terms: 33118
- Number of blossaries: 0
- Company Profile:
The U.S. Bureau of Mines (USBM) was the primary United States Government agency conducting scientific research and disseminating information on the extraction, processing, use, and conservation of mineral resources.
Founded on May 16, 1910, through the Organic Act (Public Law 179), USBM's missions ...
In an excavation, both rock that is only partially detached from the solid and that rings as solid when struck, and rock being still attached to the solid, but parting from it by incipient shear cracks.
Industry:Mining
In anthracite and bituminous coal mining, a general term applied to any worker who looks after the haulage system, performing the necessary work by which mine cars are raised and lowered to and from the mine surface. May be designated according to job, as clipper; rollerman.
Industry:Mining
In anthracite and bituminous coal mining, a laborer who controls the movement of mine cars as they are run to the top or to the bottom of the shaft by poking sprags (short metal or wooden rods) between the spokes of the wheels.
Industry:Mining
In anthracite and bituminous coal mining, a laborer who draws (tears down) stone or timber packs (pillars constructed by pack builders in the working place to support the roof during extraction of coal) to permit the roof to cave behind as the mining of the coal recedes toward the entrance of the working area.
Industry:Mining
In anthracite and bituminous coal mining, a laborer who rides trains of cars and controls their free movement down gently sloping inclines by throwing switches and by poking sprags (short, stout, metal or wooden rods) between the wheel spokes to stop them.
Industry:Mining
In anthracite and bituminous coal mining, a miner who works in rock as distinguished from coal.
Industry:Mining
In anthracite and bituminous coal mining, a person who in addition to charging and repairing batteries, removes spent storage batteries from electric mine locomotives and replaces them with freshly charged ones.
Industry:Mining
In anthracite and bituminous coal mining, a worker who installs props (posts) to support the roofs of underground working places, placing and wedging them at the most effective points.
Industry:Mining
In anthracite and bituminous coal mining, one who directs and assists the loading of mine supplies on a cage (elevator) at a mine having a separate shaft or shaft compartment for handling supplies.
Industry:Mining
In anthracite and bituminous coal mining, one who locates the centerline of underground openings in a mine, such as entries, rooms, and haulageways, so that the miners can drive the openings in a straight line without calling the mine surveyor.
Industry:Mining
