- 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 controlled flow of air to and from the faces to secure adequate ventilation of all workings and traveling roads.
Industry:Mining
The controlled leakage of air through a waste to ensure that large concentrations of mine gases do not accumulate in it.
Industry:Mining
The conventional method of strip packing on a longwall face, in which the widest pack is along the roadside. A single packing system varies but may have a 10-yd (9.1-m) roadside pack, then 7 yd (6.4 m) of waste, followed by 4-yd (3.7-m) packs and 5 yd (4.6 m) of waste repeated across the entire face.
Industry:Mining
The conventional method of winding in a mine shaft. As the cage containing the loaded cars ascends, the other cage containing the empties descends, and thus the cages and cars are balanced. Balanced winding also implies the use of a balance rope, and thus, ignoring friction, the only load to be hoisted is the coal or mineral.
Industry:Mining
The conventional system of mining in which the development headings are driven in the coal seam. Compare: horizon mining
Industry:Mining
The conversion of heat into electricity by the use of thermocouples.
Industry:Mining
The conversion or alteration of igneous or sedimentary rocks into banded rocks like jaspilite by metasomatic introduction of iron oxides and cryptocrystalline silica.
Industry:Mining
The conveyance of coal by means of water flowing in pipes. Coal may be pumped to the surface in shallow mines, but beyond 150 ft (46 m) or so of depth, there are technical difficulties. Solids handling pumps rarely deliver against heads exceeding about 200 ft 1557 (61 m). Two such pumps, placed in series, have been used in Trelewis Drift, Wales, to pump out slurry.
Industry:Mining
The conveying or haulage of coal or mineral along the working faces and outward to a junction or loading point.
Industry:Mining
