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United States Bureau of Mines
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 ...
Leic. A hole sunk from an upper to a lower portion of a thick seam of coal through which the return air passes from the stalls to the airway.
Industry:Mining
Leic. A short heading along which empties, horses, or workers travel.
Industry:Mining
Leic. After drawing a number of barrels of water out of a sump, the first barrel for which there is not sufficient water to fill it.
Industry:Mining
Leith's term for a rock possessing secondary cleavage, or cleavage in its modern meaning (1905). Compare: protoclase
Industry:Mining
Leith's term for a rock possessing what he considered to be primary cleavage; e.g., bedding planes in sedimentary rock, formed concurrently with the rock. Compare: metaclase
Industry:Mining
BQ
Letter name specifying the dimensions of bits, core barrels, and drill rods in the B-size and Q-group wireline diamond drilling system having a core diameter of 36.5 mm and a hole diameter of 60 mm.
Industry:Mining
NW
Letter name specifying the dimensions of bits, core barrels, and drill rods in the N-size and W-group wireline diamond drilling system having a core diameter of 54.7 mm and a hole diameter of 75.7 mm. The NW designation has replaced the NX designation.
Industry:Mining
Level of the ground surface after completion of excavation.
Industry:Mining
Level showing the depth of the water table below the surface; the depth at which water is encountered in trial pits or boreholes.
Industry:Mining
LiBSiO<sub>4</sub>. Used in low-temperature enamels and as a component of high-temperature, corrosion-resistant coatings.
Industry:Mining
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