- 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 little-used term for a reverse fault formed by shear in the inverted limb of an overturned fold.
Industry:Mining
A little-used term for the variation in metal values in varied geographic settings. Geochemical contrast.
Industry:Mining
A loader in which the gathering head has rotating arms that pull the stone or coal onto ramps and push it to a scraper chain conveyor, which conveys it to and delivers it at the end of the jib. The jib can be swiveled horizontally and raised or lowered to suit the tub, car, or conveyor to which it is delivering. The whole machine is self-hauling (automobile) on power-driven tractor crawlers with mechanical steering. It is not applicable in steep inclinations.
Industry:Mining
A loader limited to level or only slightly graded drivages. The machine operates a shovel in front of it and pushes itself forward; when full, the shovel is swung over the machine and delivers into a mine car or tub behind. It will shunt, pull, and push its own cars, delivering them into a shunt or passby when full.
Industry:Mining
A loading deck for lorries on the land side of a retaining wall contructed, for example, as a jetty of steel sheet piling, the relieving platform being supported as a rule partly by the wall and partly by bearing piles.
Industry:Mining
A loading machine mounted on driven wheels by which it is forced into the loose rock at the tunnel face. A bucket hinged to the chassis scoops up the material, which is elevated over and discharged behind the machine. There are two types: (1) the bucket is discharged directly into a mine car behind the machine, and (2) a short conveyor, built into the loader, receives the dirt from the bucket and conveys it back into a car or conveyor.
Industry:Mining
A loading machine of the power-shovel type for quarry and opencast operations. It may be either pneumatic-tired or continuous-tracked. It need not turn from the face to the truck if the latter can be spotted parallel to the face. The bucket is filled, the machine retracted, and the bucket swung over to the discharge point; used chiefly in sand and gravel pits.
Industry:Mining
