- 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 ...
An air lock through which materials are passed into or out of a pneumatic caisson or a shaft being driven under air pressure.
Industry:Mining
An air lock through which workers pass to a working chamber that is under air pressure.
Industry:Mining
An air-blowing system of separating coal into various sizes, and extracting waste from it, which in principle depends on the specific gravity or size of the coal and the strength of the current of air.
Industry:Mining
An airfoil (propeller) or disk fan within a cylinder and equipped with air-guide vanes either before or after the wheel; includes driving-mechanism supports for belt drive or direct connection.
Industry:Mining
An airfoil (propeller) or disk fan within a cylinder and including driving-mechanism supports either for belt drive or direct connection.
Industry:Mining
An air-operated pulsator jig in which air is alternately compressed and allowed to expand to produce pulsation. This jig has been used principally on sized bituminous coal.
Industry:Mining
An airtight portion of any shaft, winze, raise, or level used for ventilation.
Industry:Mining
An airtight, fire-resistant room in a mine used as a refuge in emergencies by miners unable to reach the surface.
Industry:Mining
