- 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 ...
A chronologic succession of sedimentary rocks from older below to younger above, essentially without interruption; e.g., a sequence of bedded rocks of interregional scope, bounded by unconformities.
Industry:Mining
A chuck equipped with two movable clamping or holding devices by means of which the motion of the chuck is imparted to the drill rods.
Industry:Mining
A churn drill in which hollow rods replace the steel wire rope. The drilling fluid is pumped down the inside of the rods, and the chipping and fluid return to the surface on the outside.
Industry:Mining
A chute in which there are no meshes or bars for separating the coal, and down which the run-of-mine coal passes from the tubs direct to the railway wagon. It is used in small mines where the coal is sold as loaded underground or at mines where the coal is conveyed by wagon to a central coal-preparation plant.
Industry:Mining
A chute through which the coal from counter-gangway workings is lowered to the gangway below.
Industry:Mining
A chute used at a transfer point in a conveyor system. The chute is designed with a curved base or some other feature so that the load can be discharged in a centralized stream and in the same direction as the receiving conveyor.
Industry:Mining
A chute used to receive and direct material or objects from a conveyor.
Industry:Mining
A chute with a bar grizzly which separates the fine from the coarse material as it passes through the chute.
Industry:Mining
A chute with narrow opening for the cleaning of coal. The slate, traveling slowly because of friction, falls into the openings and thus is removed from the coal, which, rolling freely down the incline, is carried over the narrow gap.
Industry:Mining
