- 업종: 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 high-speed tractor-mounted winch with one to three drums; used chiefly for operating bulldozers, scrapers, and rooters.
Industry:Mining
A high-speed vibrating screen in which the applied force has a frequency equal to the natural frequency of the suspended mass. In its basic form, the vibrating frame of the resonance screen is a mass oscillating between two compression springs, that alternately store and return this energy.
Industry:Mining
A high-strength, high-density, gelatinous permitted explosive having good water resistance; used for dry and wet conditions both in rock and in the breaking of hard coal.
Industry:Mining
A high-strength, high-density, nitroglycerin gelatin explosive, supplied in both unsheathed and sheathed forms.
Industry:Mining
A high-strength, low-density permitted explosive; no water resistance. It is used for coal blasting in a machine-cut seam of medium hardness in dry conditions.
Industry:Mining
A high-temperature metamorphic process that includes the effects of magma on adjacent rocks as well as those due to injection pegmatitization (Lindgren, 1933). The term is no longer in common use. Compare: pyrometamorphism.
Industry:Mining
A hill of resistant older rock over which later sediments were deposited. The overlying sedimentary beds have the form of an anticline as the result of original dip, unequal compaction, etc. The term was first applied to the underlying beds of the Healdton Field, OK.
Industry:Mining
