- 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 tunnel blasting method in which holes are arranged in a geometrical figure as an incomplete pyramid and not parallel in the planes of the sides. For tunnel widths less than 25 ft (7.5 m), the WP-cut provides a greater advance than V-cuts and fan cuts.
Industry:Mining
A tunnel constructed for disposing of mine water. Long tunnels have been driven in some mining districts for the purpose of passing under the lower workings of several mines and tapping the water for the entire group. Where topographic features permit, a drain tunnel--more properly called an adit--may also be driven to serve a single mine. The chief advantages of a drain tunnel lie in saving the cost of pumping and eliminating the danger of the mine being flooded through failure of the pumps.
Industry:Mining
A tunnel constructed for disposing of mine water. Long tunnels have been driven in some mining districts for the purpose of passing under the lower workings of several mines and tapping the water for the entire group. Where topographic features permit, a drain tunnel--more properly called an adit--may also be driven to serve a single mine. The chief advantages of a drain tunnel lie in saving the cost of pumping and eliminating the danger of the mine being flooded through failure of the pumps.
Industry:Mining
A tunnel or entry driven through barren measures, or a fault, to ascertain the character of strata beyond.
Industry:Mining
A tunnel or entry driven through barren measures, or a fault, to ascertain the character of strata beyond.
Industry:Mining
A type of peat in which the original structure of the plants has been destroyed as the result of decomposition of the cellulose matter. It is heavy, compact, and plastic when wet.
Industry:Mining
A type of pile consisting of hollow cylinders that increase resistance against bending and crumpling. They are esp. useful in shaft sinking in sand and gravel.
Industry:Mining
