- 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 ...
The hardness of microscopic areas or of the individual microconstituents in a metal, as measured by means such as the Tukon, Knoop, or scratch methods.
Industry:Mining
The haulage of vehicles by electric power, derived from overhead wires, third rail, storage batteries, or diesel-driven generators mounted on the vehicles.
Industry:Mining
The head lost as a result of the impact of particles of water; included in and scarcely distinguishable from eddy loss.
Industry:Mining
The head or height to which water can be raised on the suction side of the pump by atmospheric pressure.
Industry:Mining
The head, quantity, power, and efficiency to be expected when a fan is operating at peak efficiency.
Industry:Mining
The headings and levels excavated in a coal seam, preparatory to opening out working faces. These drivages are planned to prove and render accessible the maximum area of coal for the minimum yardage of development work. The modern trend is to make inthe- seam development as productive as possible with the aid of machines.
Industry:Mining
The hearth of a blast cupola, or open hearth furnace; a refractory vessel for melting or calcining metals, ores, etc.
Industry:Mining
The heat generated before an actual mine fire occurs. Heatings, or incipient fires, are detected in mines by smell and by analysis of air samples. In mines liable to spontaneous combustion, trained officials and workers are employed to detect and deal with heatings and fires and they become expert in these duties.
Industry:Mining
