- 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 volume of rock (in tons) corresponding to the footage drilled per hour.
Industry:Mining
The volume of water represented by a flow of 1 ft<sub>3</sub>/s (0.0283 m <sub>3</sub>/s) for 24 hours. It is 86,400 ft<sub>3</sub>(2,445 m<sub>3</sub>), or nearly 2 acre-feet (actually 1.9835); a convenient unit in storage computations.
Industry:Mining
The volume of water, soil, or other material that will cover 1 acre, 1 in deep (1 ha, 1.1 cm deep).
Industry:Mining
The wall of firebrick or stone enclosing the front of the hearth in a blast furnace.
Industry:Mining
The walls of narrow veins frequently are supported by stull timbers placed between the foot and hanging walls, which constitute the only artificial support provided during the excavation of the stopes. Stulls may be placed at irregular intervals to support local patches of insecure ground, in which case the stopes are virtually open stopes. Sometimes the stulls are placed at regular intervals both along the stope and vertically, in which case stull stoping should be considered a distinctive method.
Industry:Mining
The water gage produced by an imaginary fan that is perfect and is connected to an evase chimney of infinite height to eliminate kinetic losses at discharge. Its calculated value depends only on the speed of the blade tips and on the shape of the blades.
Industry:Mining
