- 行业: 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 ...
The slow downslope movement of talus, either individual rock fragments or the mass as a whole.
Industry:Mining
The slow increase in weight on pillars or solid coal eventually resulting in such things as crushing of the coal, heaving of the bottom, and the driving of pillars into soft floor or top. The cause normally is leaving pillars or other supports which, after considerable area is opened up, prove to be inadequate, permitting the top to settle gradually with transfer of the weight to active places and solid coal.
Industry:Mining
The slow percolation of water from artesian formations into the confining materials of a less permeable but not of a strictly impermeable character. Such percolation causes a reduction in artesian pressure, depending on the relative impermeability of the materials in the confining formations.
Industry:Mining
The slurry produced during abrasion by the cutting bit, or through fracture and grinding of part of the sample during this process.
Industry:Mining
The smallest quantity of combustible gas that, when mixed with a given quantity of air (or oxygen), will just support a self-propagating flame.
Industry:Mining
The smallest value to which the water content of a soil can be reduced by gravity drainage.
Industry:Mining
The smell given off when heating or spontaneous combustion occurs in the waste or elsewhere underground.
Industry:Mining
The smelting of copper-bearing materials, usually in a reverberatory furnace. The valuable product is a liquid, copper-iron sulfide called matte.
Industry:Mining
