- 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 V-shaped flume, supported by trestlework and used by miners for bringing down timber and wood from the mountains, at the same time using the water for mining purposes.
Industry:Mining
A wagon spotting appliance. It may be a "bogey" that is hauled backwards and forwards on a separate track installed between the main track rails by a winch. A forward pull on the bogey raises a pair of arms to engage in the wagon axle, and a reverse pull lowers the arms to enable the bogey to be drawn back under the next wagon ready for the next pull.
Industry:Mining
A wall built to sustain a face cut into the earth, in distinction to a retaining wall, which supports earth deposited behind it.
Industry:Mining
A wall carrying any load put upon it together with its own weight and the wind load.
Industry:Mining
A wall designed to withstand the force of a natural bank of earth, such as of timber used to support the face of a tunnel.
Industry:Mining
A wall designed to withstand the force of a natural bank of earth, such as of timber used to support the face of a tunnel.
Industry:Mining
A wall formed of sheet piles which may be of cantilever design, or anchored back at one or two levels. A retaining wall.
Industry:Mining
A wall of clay built around the gob or goaf to prevent the entry of air or egress of gas.
Industry:Mining
