- 行业: Mining
- Number of terms: 33118
- Number of blossaries: 0
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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 ...
The width across the cutting bit or diameter of the drilled hole. With tungsten-carbide bits it is possible to drill long holes without the loss of gage.
Industry:Mining
The width of a vein or other tabular formation as determined by borehole intercepts. This width will always be greater than the true width if the borehole intersects the vein at any direction other than perpendicular to the surface of the vein. Compare: true width
Industry:Mining
The wires, forming part of an electric detonator, to which the shot-firing cable is attached.
Industry:Mining
The words top and apex as applied to mineral veins were not a part of the miner's terminology prior to the adoption of the U.S. Mining Law of 1872, but were words used by legislators to convey the intent of the formulators of that law. Compare: apex
Industry:Mining
The work done in raising 1 lb, 1 in (0.179 kg, 1 cm); a unit of work or of energy. Abbrev., in.lb.
Industry:Mining
The work done in ventilating a mine or part of a mine is measured by the quantity circulated multiplied by the ventilating pressure required, the quantity being measured in cubic feet per minute (cubic meters per minute) and the pressure in pounds per square foot (kilograms per square meter). The horsepower required is, therefore, this product divided by 33,000.
Industry:Mining
The work done when a rate of working of 1 kW is maintained for 1 h. The British unit of electrical energy; kilowatt-hour. Abbrev: B.O.T. unit.
Industry:Mining
The work performed or the energy consumed by working at the rate of 1 hp for 1 h (2.68 MJ), being equal to 1,980,000 ft.lbf (2.68 X 10<sub>6</sub>N.m). Abbrev., hp.h.
Industry:Mining
