- 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 ...
Temporary support for the coal face. A short crosspiece is held to it by two slanting props, one hitched in the floor, the other in the roof.
Industry:Mining
Tendency for particles to break down in size (degrade) during storage and handling under the influence of light physical forces.
Industry:Mining
Tendency to deform easily. It is indicated in a tensile test by low ultimate tensile stress and large reduction in area. Usually the elongation is also high. In a notched bar test, specimens bend instead of fracturing, and energy absorbed is relatively small.
Industry:Mining
Tenn. Dark brown to black phosphorite resulting from the weathering of phosphatic limestone.
Industry:Mining
Tension at interfaces between the various phases of a system; may include solid, liquid, and gas interfaces, varying in their combinations and qualities.
Industry:Mining
Tension member connecting the feet of a roof truss, usually at the level of bearing on the wall plate or padstone.
Industry:Mining
Tension that develops in the wall of a circular tank containing liquid or solid material.
Industry:Mining
Term applied to any number of things that may initiate or trigger rock bursts. Such triggers include blasting, changes of temperature, sudden influxes of water, and even rock bursts themselves, which sometimes act as a trigger impulse to initiate a second burst.
Industry:Mining
Term applied to dissolving and recovering minerals from subore-grade materials from a mine dump. The dump is irrigated with water, sometimes acidified, which percolates into and through the dump, and runoff from the bottom of the dump is collected and mineral in solution is recovered by a chemical reaction. Commonly used to recover gold and copper.
Industry:Mining
