- Industry: 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 ...
In mine ventilation, a practice that allows the airflow to divide among the branches of its own accord and without regulation, in inverse relation to the resistance of each airway. Compare: controlled splitting.
Industry:Mining
In mine ventilation, a split where it is necessary to control the volumes in certain lowresistance splits to cause air to flow into the splits of high resistance.
Industry:Mining
In mine ventilation, the cross-sectional area of the entry or duct through which the air flows; expressed in square meters.
Industry:Mining
In mine ventilation, the linear distance in feet of the airway perimeter rubbing surface at right angles to the direction of the airstream.
Industry:Mining
In mine ventilation, the standard density of air for mine ventilation work is considered to be 0.075 lb/ft<sub>3</sub>(1.2014 kg/m<sub>3</sub>). This is based upon the weight of 1 ft<sub>3</sub>(0.028 m<sub>3</sub>) of dry air at 70 degrees F (21.1 degrees C) at a sea-level pressure of 29.9 in (759 mm) of mercury.
Industry:Mining
In mineral concentration by jigging, the stroke of the plunger device that controls the hydraulic lift of water through the bed of particles.
Industry:Mining
In mineral concentration, word used in connection with response of a specific mineral to flotation process.
Industry:Mining
In mineral deposits, a pattern of finely acicular, rodlike crystals, e.g., in chrysotile and amphibole asbestos.
Industry:Mining
