- 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 ...
The substitution for a common element in a crystal lattice by a trace element of the same valence. Compare: admittance; capture.
Industry:Mining
The subterranean seat or center of volcanism of a region or of a volcano.
Industry:Mining
The sudden jerking or twitching of a haulage rope due to the rope laps slipping to a smaller diameter on the drum. A severe plucking of a rope may be felt faintly more than 800 yd (725 m) distance from the engine.
Industry:Mining
The sudden release of the weight of the rocks over a coal seam or of enormous lateral stresses due to structural or tectonic folds and thrusts and sometimes both. A rock bump may take the form of a pressure bump or a shock bump.
Industry:Mining
The sum of all energy losses in the ventilation system. Numerically, it is the total of the mine static and velocity heads.
Industry:Mining
The sum of static and dynamic head. The vertical distance between intake and free delivery of pump is static head. Allowance for friction, power loss, propeller slip, and issuing velocity is made for calculating the overall discharge head.
Industry:Mining
The sum of the costs of mining, beneficiation, and administration gives the operating cost of a mine.
Industry:Mining
The sum of the elevation head, pressure head, and velocity head of a liquid. For ground water, the velocity-head component is generally negligible.
Industry:Mining
The sum of the free and combined carbon (including carbon in solution) in a ferrous alloy.
Industry:Mining
