- المجال: 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 ...
A sheave fixed at the inside end of an endless or tail-rope hauling plane, around which the rope returns.
Industry:Mining
A sheet of brattice or other material erected in a roadway or face to remove a combustible gases layer. It is usually set at an angle of about 45 degrees from the horizontal and inclined in the direction of airflow.
Industry:Mining
A sheet of cellulose impregnated with optically aligned crystals of quinine iodosulfate, which permit passage of light with its electric vector in one plane while absorbing all other impinging light. It is a cheap substitute for Nicol prisms in modern polarized-light microscopes.
Industry:Mining
A sheet of metal with an adherent film of mercury that seizes gold from flowing pulp.
Industry:Mining
A sheet on which are printed illustrations of various drilling equipment assemblies with the component items shown in their relative operating positions; used as a guide in making up a list of the units necessary to do various routine drilling jobs.
Industry:Mining
A sheet piling extractor that works on the same principle as the piledriving hammer, except that the force of the blow is upward rather than down.
Industry:Mining
A sheet, spread, or patch of surficial gravel, often compacted, occupying a flat area on a hilltop, plateau, or other high region at a height above that normally occupied by a stream-terrace gravel. It may represent a formerly extensive deposit that has been raised by earth movements and largely removed by erosion.
Industry:Mining
A sheetlike accumulation of combustible gases under the roof of a mine roadway where the ventilation is too sluggish to dilute and remove the gas. Although the term is new, the hazard existed since the earliest days of coal mining. A combustible gases layer may be specified as one in which the gas is 5% or over and of a length greater than the width of the road in which it occurs. See: pocket of gas See also: stratification of methane
Industry:Mining
