- 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 ...
Eng. The operation of establishing an air current between the downcast and upcast shafts.
Industry:Mining
Eng. The original and typical series of Carboniferous rocks, comprising the Upper Old Red Sandstone, the Mountain limestone, the Millstone grit, and the Coal Measures.
Industry:Mining
Eng. The point or mixture at which combustible gases mixed with atmospheric air explodes. The percentages of gas vary from 6% to 13%, with the maximum explosibility at about 11%.
Industry:Mining
Eng. The settling or natural subsidence of the surface caused by extensive underground mining.
Industry:Mining
Eng. Those rocks in which lodes become productive of mineral of value.
Industry:Mining