- 行业: 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 ...
The quantity of heat that is absorbed when 1 g equivalent of a substance is broken up completely into positive and negative ions.
Industry:Mining
The quantity of heat transmitted per unit time from a unit of surface to an opposite unit of surface of material under a unit temperature differential between the surfaces.
Industry:Mining
The quantity of methane discharged from the strata and coal seams into the ventilating air of a coal mine. The rate may be expressed on a time or tonnage basis. Gas emission varies with (1) the rate of advance of the workings; (2) the face operation such as cutting, blasting, loading, etc.; and (3) the barometric reading.
Industry:Mining
The quantity of mineral product from a mine produced solely for use by the parent company or subsidiary.
Industry:Mining
The quantity of moisture (not removable by mechanical means) contained by a coal in equilibrium with an atmosphere saturated with water vapor. This is employed in some systems of classification as a criterion of rank.
Industry:Mining
The quantity of water evaporated per unit of time (usually 1 h) times the latent heat of vaporization at the evaporating temperature.
Industry:Mining
The quantity of water that would be evaporated by a given apparatus if the water is received by the apparatus at 212 degrees F (100 degrees C), and vaporized at that temperature under atmospheric pressure. It is expressed in kilograms per hour.
Industry:Mining
The quantity of water that would cover 1 acre, 1 ft deep (1 ha, 13.6 cm deep). One acrefoot contains 43,560 ft<sub>3</sub>(1,233 m<sub>3</sub>).
Industry:Mining
The quantity-distance table, prepared and approved by the Institute of Makers of Explosives (IME), for storage of explosive materials to determine safe distances from inhabited buildings, public highways, passenger railways, and other stored explosive materials.
Industry:Mining
The radial pressure of wire rope is a function of the rope tension, rope diameter, and tread diameter. The radial pressure can be determined by the following equation: P = 2T/Dd, where P equals radial pressure in pounds per square inch; T equals rope tension in pounds; D equals tread diameter of sheave or drum in inches; and d equals rope diameter in inches.
Industry:Mining
