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United States Bureau of Mines
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 ...
An electric picker that distinguishes between good coal and slate by their different electrical conductivities. It is said to be more accurate than the human slate picker, who, when fatigued, may fail to remove all the impure material.
Industry:Mining
An electric vehicle having a powered drum for handling wire rope used to pull mine props after coal has been removed; used for the recovery of the timber.
Industry:Mining
An electric vibrating screen operated by action on an oscillating armature and a stationary coil.
Industry:Mining
An electrical contact between part of the blasting circuit and earth.
Industry:Mining
An electrical device for firing blasts, approved by the U.S. Mine Safety and Health Administration.
Industry:Mining
An electrical device for indicating the presence of magnetic material in an area.
Industry:Mining
An electrical exploration method in which electric current is introduced into the ground by means of electromagnetic induction and in which the magnetic field associated with the current is determined.
Industry:Mining
An electrical installation containing generating or power-conversion equipment and associated electric equipment and parts, such as switchboards, switches, wiring, fuses, circuit breakers, compensators, and transformers.
Industry:Mining
An electrical measuring instrument comprising a hand-operated generator equipped with a governor, a moving measuring system consisting of a voltage, and a current coil so disposed that the deflection of the moving system is proportional to the ratio of voltage 1943 to current. Used to measure insulation resistance and resistance to ground. It has been used to some extent in electrical prospecting.
Industry:Mining
An electrical method in which a potential field caused by spontaneous electrochemical phenomena is measured.
Industry:Mining
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