- 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 contamination of ore with barren wall rock in stoping. The assay of the ore after mining is frequently 10% lower than when sampled in place.
Industry:Mining
The content of fixed carbon divided by the content of volatile matter is called the fuel ratio. According to their fuel ratios, coals have been classified as anthracite, at least 10; semianthracite, 6 to 10; semibituminous, 3 to 6; and bituminous, 3 or less.
Industry:Mining
The content of water vapor in air, expressed as the mass of water per unit volume of air. Compare: relative humidity
Industry:Mining
The continuous circulation of all or some part of the same air in part of a mine ventilation system.
Industry:Mining
The continuous phase of a polyphase alloy or mechanical mixture; the physically continuous metallic constituent in which separate particles of another constituent are embedded.
Industry:Mining
The control of the discharge into watercourses (or on adjacent land), of mineralized or impure water, or sludge, or mining debris.
Industry:Mining
The control of ventilation in mines, as by doors, brattices, and stoppings.
Industry:Mining
The control valve provided for the purpose of admitting compressed air to an airblasting shell and of venting residual air, in the shell and hose, to the atmosphere.
Industry:Mining
