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United States Bureau of Mines
Industry: 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 ...
Coal reserved from lease, as coal under buildings.
Industry:Mining
Coal secured in pillar robbing.
Industry:Mining
Coal sold at the pithead.
Industry:Mining
Coal supplied to a plant or machine, in which it undergoes some form of preparation.
Industry:Mining
Coal that adheres strongly to the rock above or below it.
Industry:Mining
Coal that does not display a striated or banded appearance on the vertical face. It contains essentially no vitrain and consists of clarain or durain, or of material intermediate between the two.
Industry:Mining
Coal that does not form cake; namely hard, splint, cherry, and durain coal.
Industry:Mining
Coal that has been crushed fine; may be transported by air to fire a boiler or industrial heating furnace.
Industry:Mining
Coal that has passed over any kind of a screen and therefore consists of the marketable sizes.
Industry:Mining
Coal winning in three stages in underground mining. First, large pillars are left as the face is advanced by means of drives. Second, parallel drives connect these drives and form large blocks. Finally, the pillars so formed are mined.
Industry:Mining