- 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 ...
A tractor, fitted with large rubber-tired wheels, which can travel comparatively fast over rough ground.
Industry:Mining
A trade name for a chemical additive that eliminates or reduces considerably the danger of diesel locomotive fumes underground. Tests have established that the chemical, added to diesel fuel, reduces the carbon-monoxide danger from diesel locomotive exhausts to negligible proportions.
Industry:Mining
A trade name for a light, flaky material obtained by roasting vermiculite, which swells to 15 times its original volume, forming golden yellow scales; from Libby, MT. A titaniumbearing jefferisite from Westcliffe, CO., is similar.
Industry:Mining
A trade name for a longwall steel support system. It consists of two 50-st (45-t) chocks in line at right angles to the face and linked together with a double-acting ram. In operation, the front chock is lowered and advanced with the conveyor and reset to the roof; the rear chock is then lowered and brought forward.
Industry:Mining
A trade name for a material of asbestos fiber and Portland cement molded under high pressure. Used for fireproof walls, roofing, and in lining ovens, etc.
Industry:Mining
A trade name for a precise electronic surveying device that transmits a radio-frequency signal to a responder unit, which in turn transmits the signal back to the interrogator unit. The time lapse between original transmission and receipt of return signal is measured and displayed in a direct digital readout for eventual reduction to a precise linear distance. It operates on the same principle as the tellurometer.
Industry:Mining
A trade name for a smokeless fuel produced by carbonizing coal at a temperature of about 600 degrees C. It has a calorific value of about 13,000 Btu/lb (30.2 MJ/kg) and is used for domestic purposes.
Industry:Mining
A trade name for a smokeless fuel produced by carbonizing coal at a temperature of about 600 degrees C. It has a calorific value of about 13,000 Btu/lb (30.2 MJ/kg) and is used for domestic purposes.
Industry:Mining
