- 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 water level of a well that is not being affected by withdrawal of ground water.
Industry:Mining
The water or oil in which mudlike solids are suspended; used to support the open bore and cool and clear the cuttings from a drill bit. The fluid is circulated while rotaryand/ or diamond-drilling a borehole.
Industry:Mining
The water seeping into shallow workings or shafts may be traced to the surface source by means of tracer dyes or salts. These substances, however, may be leached out of the water by the soil or strata. Some radioactive isotopes are better tracers because of the high sensitivity with which they can be detected. Tritium, an isotope of hydrogen, is unique because it can be used to label the actual water molecule to be traced and is not chemically removed by the strata.
Industry:Mining
The water table of a body of perched ground water. See: vertical sand drain
Industry:Mining
The water used in a condenser or in a washery or other wet process is often repumped into the system by means of a circulating pump. The practice is economical in water and in reagent consumption and also reduces pollution of local streams. Water that is recirculated is clarified to reasonable purity.
Industry:Mining
The water used in the wet separation of coal from shale by differences in density.
Industry:Mining
The water, mud, or other circulated medium reaching the borehole collar after having been circulated past the drill bit.
Industry:Mining
The water-content range of a material at which it is plastic, defined numerically as the liquid limit minus the plastic limit. Compare: Atterberg limits; plastic limit.
Industry:Mining
The waters of the Earth, as distinguished from the rocks (lithosphere), living things (biosphere), and the air (atmosphere). Includes the waters of the ocean; rivers, lakes, and other bodies of surface water in liquid form on the continents; snow, ice, and glaciers; and liquid water, ice, and water vapor in both the unsaturated and saturated zones below the land surface. Included by some, but excluded by others, is water in the atmosphere, which includes water vapor, clouds, and all forms of precipitation while still in the atmosphere.
Industry:Mining
