upload
United States Bureau of Mines
Industry: 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 ...
Fractions with a defined upper limit of specific gravity and so described, e.g., sinks 1.60 specific gravity.
Industry:Mining
Fractions with a defined upper limit of specific gravity and so described; e.g., floats, sp gr, 1.40.
Industry:Mining
Fracture or failure of a rock that has been stressed beyond its ultimate strength.
Industry:Mining
Fracture using a hydraulic cartridge, a ram-operated device used to split coal.
Industry:Mining
Fractures occurring in rock quarries where the rock is under compressive stress. This stress is relieved locally in the process of quarrying, resulting in the rending or fracturing of the rock mass.
Industry:Mining
Fracturing the slate along the grain, e.g., across the cleavage.
Industry:Mining
Fragile, weak, or slender as in the case of a thin, soft roof bed over a coal seam.
Industry:Mining
Fragmentary rock material that has crumbled and fallen away from the sides of a borehole or mine working. It may obstruct a borehole or be washed out during circulation of the drilling mud. Pron: sluff.
Industry:Mining
Fragments of country rock enclosed in a mineral vein.
Industry:Mining
Fragments of rock in the brecciated zone of a fault.
Industry:Mining