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United States Bureau of Mines
업종: 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 ...
A hinged clamp on the bottom of a hand drill.
Industry:Mining
A hinged platform to cover the mouth of a shaft.
Industry:Mining
A hissing noise often made by gas and water when a seam of coal is cut into.
Industry:Mining
A historical method of drilling blastholes in rock by hammer and a hand-held steel or bit. Single-jack drilling was done by one miner. In double-jack drilling, one miner held the steel for one or two strikers with hammers.
Industry:Mining
A hoist with two drums that can be driven separately or together by a clutch.
Industry:Mining
A hoist worked with a whip, esp. if by steam power.
Industry:Mining
A hoisting device carried by a frame mounted on wheels.
Industry:Mining
A hoisting device that does its lifting by means of an electromagnet.
Industry:Mining
A hold or grip on a drill rod, casing, or pipe by means of serrated-face steel wedges or slips.
Industry:Mining
A hole at or near the bottom of a furnace or ladle through which molten metal, matte, or slag can be tapped or drawn from a furnace.
Industry:Mining
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