- 업종: Mining
- Number of terms: 33118
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- 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 fan installed in an underground opening. A booster fan can be used as the main mine fan but is more commonly used to improve or augment the ventilation in a segment of the mine. Booster fans are illegal in U.S. coal mines but are used in metal mines and coal mines in other countries.
Industry:Mining
A fan that consists of several streamlined blades mounted in a revolving casing. The cross section and spacing of the blades are designed aerodynamically. This design ensures that the air flows without recirculation between the blades and leaves the rotor in a steady and regularly distributed stream. This appreciably reduces frictional, conversion, and recirculation losses. Fans of a convenient size can handle large volumes of air at the highest pressures likely to be required in mine ventilation.
Industry:Mining
A fan that sucks or draws the air toward it through airways or air pipes. The term generally used is exhaust fan.
Industry:Mining
A fan to direct part of an air circuit through a tubing to a particular working face.
Industry:Mining
A fan which blows or forces the intake air into the mine workings, as opposed to an exhaust fan. A mine exhaust fan may become a forcing fan (with reduced efficiency) when the ventilation is reversed in an emergency.
Industry:Mining
A fan with an airfoil-shaped blade that moves the air in the general direction of the axis about which it rotates.
Industry:Mining
A fantastic column, pinnacle, or pillar of rock produced in a region of sporadic heavy rainfall by differential weathering or erosion of horizontal strata, facilitated by joints and by layers of varying hardness, and occurring in varied and often eccentric or grotesque forms.
Industry:Mining
A fantastic column, pinnacle, or pillar of rock produced in a region of sporadic heavy rainfall by differential weathering or erosion of horizontal strata, facilitated by joints and by layers of varying hardness, and occurring in varied and often eccentric or grotesque forms.
Industry:Mining
A fast moving plow with picks attached. The rapid plow is a continuous longwall cutter loader capable of working unattended on the face. For this reason, it is one of the safest machines in operation.
Industry:Mining
