- 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 trace on the ground motion record representing the component of motion in a vertical plane and in the direction of the seismic wave travel direction.
Industry:Mining
A trachyandesite composed of olivine and augite phenocrysts in a groundmass of labradorite with alkali feldspar rims, olivine, augite, a small amount of leucite, and some dark-colored glass. Shoshonite grades into absarokite with an increase in olivine and into banakite with more sanidine. Its name, given by Iddings in 1895, is derived from the Shoshone River, WY.
Industry:Mining
A tracing on which the workings in a seam are shown. A series of such tracings allows the workings in several seams to be seen in their correct horizontal relationship.
Industry:Mining
A tracing on which the workings in a seam are shown. A series of such tracings allows the workings in several seams to be seen in their correct horizontal relationship.
Industry:Mining
A track arrangement for bringing a wagon or mine car to another track without the need for a curve, turntable, or traverser.
Industry:Mining
A track arrangement for bringing a wagon or mine car to another track without the need for a curve, turntable, or traverser.
Industry:Mining
A track arrangement for bringing a wagon or mine car to another track without the need for a curve, turntable, or traverser.
Industry:Mining
A track device that permits rail traffic to cross over another track which heads in a different direction on the same level. Signal lights are activated to avoid collision on the crossover.
Industry:Mining
A track layout for rail or road transport from large opencast pits. The track is arranged spirally along the steep rise from the coal or ore benches so that the gradient is moderate throughout.
Industry:Mining
