- 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 ...
The blasting of oblique, horizontal holes along a face and so cutting a series of slabs that, in plan, resemble saw teeth.
Industry:Mining
The blue part or inner cone of the flame produced by a blowpipe; characterized by an excess of hydrocarbon over oxygen so as to reduce mineral samples heated in it.
Industry:Mining
The boards that form the sides, bottom, and ends of a mine car, or hutch.
Industry:Mining
The boundary lines of a mining claim that cross the general course of the vein at the surface. If the side lines cross the course of the vein instead of running parallel with it, they then constitute endlines. When a mining claim crosses the course of the lode or vein instead of being along such lode or vein, the endlines are those that measure the width of the claim as it crosses the lode.
Industry:Mining
The boundary of an underground opening that requires no support. The material around this boundary may be considered to be in the elastic state, and no pressure need be exerted against the boundary to prevent the material from fracturing and falling into the opening.
Industry:Mining
