- 行业: Mining
- Number of terms: 33118
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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 direction in which a drill circulation fluid is flowing after it has passed the bit and continues toward the collar of a borehole.
Industry:Mining
The direction in which sediments were laid down. Uranium mineralization often follows such trends, owing to increased porosity, carbon precipitants, and other factors.
Industry:Mining
The direction of the top of beds is esp. important in steeply dipping or overturned beds. The tops of the beds or their facing is determined by ripple marks, graded bedding, crossbedding, mud cracks, pillow structure, etc.
Industry:Mining
The direction, with respect to north, of the intersection of the fault surface, or of the shear zone, with a horizontal plane. See: strike
Industry:Mining
The disintegration or scaling of exposed surfaces of mine roadways, particularly in the case of clay or shale rocks. Gunite has been used for roadway protection against weathering.
Industry:Mining
The distance a drilling machine moves the steel shank in traveling from top to bottom of its feeding range.
Industry:Mining
The distance a drive-type soil sampler, casing, drivepipe, pile, or penetrometer is driven into the formation being tested by each blow delivered by a specific-size drivehammer allowed to fall a specific distance.
Industry:Mining
The distance between adjacent shotholes in a direction parallel to the quarry or other face.
Industry:Mining
