- 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 ...
Designating the pole (end) of a pyroelectric crystal that is negative while the crystal is being heated and positive as it cools. Compare: analogous
Industry:Mining
Designed as an all-purpose mask for protection against a great variety of toxic gases, vapors, and smokes, including carbon monoxide. It is equipped with an indicator that shows at a glance the remaining service time of the canister for carbon monoxide. This mask is particularly effective for mines, fire fighting, and general industrial uses where the contaminants are of relatively low content.
Industry:Mining
Designed esp. for use in mines, these signal lights at individual switches immediately indicate to the motorman whether or not it is safe to proceed. Green and amber lights work automatically with the movement of the switches. May be used with locally controlled switches, or with those operated by a central dispatcher.
Industry:Mining
Designed to fight underground fires in mining operations, this low slung railcar is equipped with a water supply and pressure equipment for its fire hoses. When a fire occurs, the car can be sped to the scene along existing rails. The truck is capable of delivering hundreds of gallons of water, depending upon the size and model used.
Industry:Mining
Designed to obtain cores up to about 4 ft (1.2 m) in length, the Phleger corer is utilized where only the upper layers of the sea bottom are to be analyzed.
Industry:Mining
Destructive chemical reaction between refractories and external agencies at high temperatures, resulting in the formation of a liquid.
Industry:Mining
Destructive chemical reaction between refractories and external agents at high temperatures, resulting in the formation of a molten liquid.
Industry:Mining
Destructive metamorphism in the katamorphic zone, at or near the Earth's surface, in which complex minerals are broken down and altered through oxidation, hydration, solution, and allied processes to produce simpler and less dense minerals. The term was introduced by Van Hise in 1904. Also spelled catamorphism. Compare: anamorphism
Industry:Mining
Detachment structure of strata owing to deformation, resulting in independent styles of deformation in the rocks above and below. It is associated with folding and with overthrusting. Etymol: French, unsticking, detachment. Compare: disharmonic folding
Industry:Mining
