- Industry: 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 ...
Mill with three rolls, the middle roll being much smaller than the other two. Only the two larger rolls are driven, work being performed between the bottom and middle and middle and top rolls alternately; the roll setting is adjusted between passes.
Industry:Mining
Mine chamber equipped with rescue gear, including oxygen apparatus, and manned by trained rescue workers.
Industry:Mining
Mine doors help to keep the air flow in shafts and mine working areas constant. In cases of explosions, doors "give" to relieve the pressure, then close automatically. The doors are mobile and can be set up in any location. They are opened and closed by a compressed-air cylinder and are designed to be used where haulage equipment operates on a trolley wire.
Industry:Mining
Mine opening over the haulage level through which ore from the stope above is drawn to waiting trucks as planking is removed. Usually, an opening between stulls below the shrinkage stope.
Industry:Mining
Mine timbering in which the caps reach across two or more sets in a drift or stope.
Industry:Mining
Mine ventilation by the same air current, i.e., without splitting of air.
Industry:Mining
Mine ventilation in which the air flows from the fan at the portal toward the working face.
Industry:Mining
Mineral aggregate containing very few small particles so that the void spaces are relatively large.
Industry:Mining
