- 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 self-loading carrier device with a scraperlike, retractable bottom; usually selfpropelled and used esp. for excavating and hauling unconsolidated or crushed rock and earthy materials.
Industry:Mining
A self-priming centrifugal pump containing a trap, which always ensures sufficient water for the pump to function, and also a separator to remove the entrained air in the water.
Industry:Mining
A self-propelled machine generally mounted on crawler tracks designed for digging trenches or ditches. It is equipped with either a bucket ladder or buckets mounted around the periphery of a circular wheel.
Industry:Mining
A self-propelled vehicle--which may be mounted on crawler tracks, on wheels with large pneumatic tires, or on a mixture of both--intended for moving itself and other vehicles.
Industry:Mining
A self-propelling machine capable of lifting material off the bottom and placing it in a mine car, conveyor, or other means of transportation.
Industry:Mining
A self-recording anemometer giving a continuous trace of the direction and velocity of surface wind. In the Dines tube anemograph, the wind pressure acts upon the opening of a tube arranged as a vane to face in the direction of the wind. Pressure is transmitted through the tube to a float carrying a pen, the height of which indicates the wind velocity.
Industry:Mining
A self-recording thermometer that gives a continuous trace of air temperature on a rotating drum worked by clockwork. It is mainly used for recording variations in temperature rather than actual temperatures.
Industry:Mining
A self-rescuer consisting of a hermetically sealed, quick-release canister with inhalation and exhalation valves fitted to the top, a head strap, a rubber mouthpiece, a chin rest, and a nose clip. It is carried on a miner's belt and weighs only 22 oz (0.62 kg). The air enters at the perforated diaphragm in the bottom of the canister, and passes through layers of filters before it reaches the mouthpiece. The complete respirator is held in position by a head strap.
Industry:Mining
A self-sufficient breathing unit that permits freedom of movement, unencumbered by air hoses. It offers the wearer respiratory protection in atmospheres that are either oxygendeficient or too highly toxic to permit the use of gask masks or respirators. The oxygen or air is supplied in compressed form or by chemical generation, and the wearer's exhalations are either purified for re-use or released to the surrounding atmosphere. The equipment is devised to afford protection for special lengths of time, in accordance with the standards set by the Mine Safety and Health Administration. The 2-h apparatus is used for mine rescue and recovery operations; shorter period apparatus is available for industrial uses and auxiliary equipment.
Industry:Mining
A semigelatinous permitted explosive possessing both high power and good waterresisting properties. It has a density about midway between Dynobel No. 2 and Ajax.
Industry:Mining
