- 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 hardwood plug drilled so as to allow a track spike to be driven through it into a timber sleeper.
Industry:Mining
A hat designed for miners to provide head protection and for holding the cap lamp.
Industry:Mining
A haul whose cost is included in the cost of excavation, so that no separate charge is made for it.
Industry:Mining
A haulage system in which a single rope is used passing around a surge wheel. A single track may be used or, if more than one train is hauled, a single track with passbys, or a three-rail system with passbys, that eliminates facing points, may be used. The system may be operated at higher speeds than normal endless systems since the trains are attached and detached from a rope at rest; it has been used for the haulage of workers at speeds up to 12 mph. Extra rope must be spliced onto the rope, and the return wheel moved forward, when the system is extended.
Industry:Mining
A hauling rope, to which cars are attached by a clip or chain, either singly or in trips.
Industry:Mining
A Hawaiian term for lava consisting of a rough assemblage of clinkerlike scoriaceous masses. It is contrasted with pahoehoe used to designate the smoother flows. Pron. ah-ah.
Industry:Mining
A head covering made of reinforced sheet aluminum or plastic-impregnated fabric and shaped somewhat like a sun helmet; worn for protection and/or to reduce the severity of head injuries from falling objects.
Industry:Mining
A head covering made of reinforced sheet aluminum or plastic-impregnated fabric and shaped somewhat like a sun helmet; worn for protection and/or to reduce the severity of head injuries from falling objects.
Industry:Mining
