- 行业: Mining
- Number of terms: 33118
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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 ...
An elongated recess in an intake airway of a mine for servicing locomotives. It contains two or three rail tracks (with pit space under one), good lighting, lifting equipment, oils, 1833 benches, and tools. Where battery locomotives are used, the garage will serve as a charging station.
Industry:Mining
An elongated region of mineralization; an area containing several mineral deposits.
Industry:Mining
An elongated zone of the Earth's crust subjected to relatively great structural deformation. Compare: geosyncline
Industry:Mining
An elongated, steep-walled cleft running across or partially across the Continental Shelf, the continental borderland and/or slope, the bottom of which grades continually downwards.
Industry:Mining
An elutriator consisting of a tall glass vessel tapering toward the bottom, where water enters at a constant rate. Schone's formula is: V = 104.7 (S1)<sub>1.57</sub>D<sub>1.57</sub>where V is the velocity of water (millimeter/second) required to carry away particles of diameter D and specific gravity, S. (Dodd, 1964)
Industry:Mining
An emanation, from the Earth, of vapors that are principally boric acid; also, the opening from which the vapors issue.
Industry:Mining
An emerald glass or beryloscope mounted to resemble a hand loupe. Observed through it the filament of an incandescent lamp appears reddish yellow, and this color is not changed when also passing through most genuine emeralds; but a Brazilian emerald from Minas Geraes appears green, an epidote red, and a dioptase green.
Industry:Mining
An emerald glass or beryloscope mounted to resemble a hand loupe. Observed through it the filament of an incandescent lamp appears reddish yellow, and this color is not changed when also passing through most genuine emeralds; but a Brazilian emerald from Minas Geraes appears green, an epidote red, and a dioptase green.
Industry:Mining
