- 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 small opening from one place in a coal mine to another; smaller than a breakthrough.
Industry:Mining
A small opening from one place in a coal mine to another; smaller than a breakthrough.
Industry:Mining
A small particle of any kind around which crystals begin to form when a substance crystallizes.
Industry:Mining
A small pipe built into and through a stopping or seal to enable samples to be taken of the air within the sealed area. The analysis of such samples will give an indication of the state of the fire or heating. In the case of a waste heating a sampling pipe may be pushed into the waste, on the return side, to give an indication of the conditions.
Industry:Mining
A small portable compressed-air hoist for operating a scraper-loader or for pulling heavy timbers into position, often used in narrow stopes.
Industry:Mining
A small portable direct-reading instrument used to measure the velocity of air at a point.
Industry:Mining