- 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 portable three-component seismograph designed primarily for registration of vibrations from blasts, traffic, machinery, and general industrial sources.
Industry:Mining
A portable unit consisting of a prilled explosive reserve tank feeding into an air-activated loading tube. The equipment should be grounded to guard against buildup of static electricity and possible accidental explosive detonation. The blasthole charger permits rapid loading of prilled explosives into blastholes drilled in any direction.
Industry:Mining
A portable unit consisting of a thermistor sensing element, 6-V power supply, amplifier, and recorder. The recorder is geared to a drum containing an electrical cable to which the bead is fastened. When the bead is lowered into the water, the paper on the recorder is moved accordingly. Depth is measured by the amount of wire paid out. This device is used in shallow water, particularly in lakes.
Industry:Mining
A portable, lightweight instrument for detecting carbon monoxide in mine air. Most of these instruments allow instantaneous reading of the carbon monoxide content but can also be used in an automated recording and monitoring system.
Industry:Mining
A portable, manually operated system used in prospecting alluvial deposits to depths of 50 ft (15.2 m) or more. Also known as an Empire drill.
Industry:Mining
A portal type of crane having a lifting capacity of 50 st (45 t) or more, with the crab traveling along the horizontal beam.
Industry:Mining
A portion of a deposit composed of pay ore; generally a dipping band within a more continuous vein.
Industry:Mining
A portion of an unconsolidated sediment or of a crushed consolidated rock sample or of a crushed ore or mineral sample that has been separated by some method, and is distinguished in some manner from all the other portions (or fractions) comprising the whole sample being analyzed. Also a fraction may be separated and defined on the basis of its mineral content, its specific gravity or density, its magnetism or lack of magnetism, or its solubility or insolubility in acid.
Industry:Mining
A portion of the coal seam which, by undercutting, has had its natural support removed.
Industry:Mining
A portion of the Earth's crust that moves as a relatively rigid unit with respect to adjacent crustal plates that collectively cover the outermost part of the solid Earth.
Industry:Mining
