- 行业: Mining
- Number of terms: 33118
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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 ...
A bar or low ridge of sand that borders the shore and is built to, or nearly to, the water surface by currents in a river or by wave action along the shore of a lake or sea.
Industry:Mining
A bar or low ridge of sand that borders the shore and is built to, or nearly to, the water surface by currents in a river or by wave action along the shore of a lake or sea.
Industry:Mining
A bar, usually constructed of steel, that is inserted into pre-drilled holes in rock and secured for the purpose of ground control. Rock bolts are classified according to the means by which they are secured or anchored in rock. In current usage there are mainly four types: expansion, wedge, grouted, and explosive. See also: roof bolt.
Industry:Mining
A bare or insulated cable used to connect the metal frame of a piece of equipment to the mine track or other effective grounding medium.
Industry:Mining
A barge similar to a hopper barge, frequently used to take dredged material from a dredger to the dumping ground.
Industry:Mining
A barometer that makes a continuous record of changes in atmospheric pressure. It is usually an aneroid type. See also: barometer.
Industry:Mining
A barometric surveying instrument that is free from the many defects of the aneroid barometer. The apparatus records the change in pressure of a constant volume of air maintained at a constant temperature.
Industry:Mining
A barrel in which grained gunpowder is tumbled with graphite to glaze it.
Industry:Mining
A barrel made for the conveyance of gunpowder, usually holding 100 lb (45.4 kg). Compare: powder keg.
Industry:Mining
