- 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 surface of the earth or rock prepared to support a structure or a pavement system.
Industry:Mining
The surface or strip of relatively smooth land adjacent to a river channel, constructed by the present river in its existing regimen and covered with water when the river overflows its banks. It is built of alluvium carried by the river during floods and deposited in the sluggish water beyond the influence of the swiftest current.
Industry:Mining
The surface subsidence that manifests itself a few months after mineral extraction and that usually constitutes 60% to 90% of the total subsidence. It varies according to the depth and thickness of the seam, the nature of the overburden, the mining method, and the thoroughness of the filling in the mined-out areas. The primary period is followed by the secondary period, in which the surface subsides gradually for a period of many years or even decades.
Industry:Mining
The surface temperature of the sea as measured by a bucket thermometer or by immersing a surface thermometer in a freshly drawn bucket of water.
Industry:Mining
The surfaces or inset cutting points on a bit that face in the same direction as the rotation of the bit.
Industry:Mining
The survey of a mining claim located on lands classified as agricultural.
Industry:Mining
The susceptibility of a paramagnetic substance is inversely proportional to the absolute temperature. A law of magnetism that has been replaced by the Curie-Weiss law.
Industry:Mining
The swelling up by differential heating of magma; e.g., by local concentrations of radioactive matter.
Industry:Mining
The system adopted to work or extract material in a mine. It includes all the operations involved in the cutting, handling, and transport of valuable material and waste rock, support of ground, ventilation of workings, and provision of supplies. The term does not include winding or hoisting, surface handling, and preparation or dressing.
Industry:Mining
