- 行业: Mining
- Number of terms: 33118
- Number of blossaries: 0
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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 gold-mining district, now usually called the Rand, in South Africa.
Industry:Mining
The grade or classification into which a gem is placed by examination of its color in comparison to the color of other gems of the same variety.
Industry:Mining
The grade that determines tonnage that can be handled by a single locomotive over a particular engine district.
Industry:Mining
The gradient at which flow in a pipe of a particular diameter will carry away any solids in it. This gradient must not be too steep nor too gradual, and is usually established under local laws affecting drains and sewers.
Industry:Mining
The gradient at which the tractive force required to pull an empty tram inby (slightly uphill) is equal to that required to pull a loaded tram outby. This was formerly termed horse haulage gradient. In general, haulage roads are graded about 0.5% in favor of the loaded trams.
Industry:Mining
The grading of ores into different sorts and the separation of waste from coal by the difference in the specific gravity of the minerals to be separated.
Industry:Mining
