- 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 ...
Amorphous sulfur in a finely divided condition. Prepared by the action of dilute sulfuric acid on sodium thiosulfate or by the reaction of hydrogen sulfide and sulfurous acid. Also prepared by mixing equivalent solutions of hydrogen sulfide and sulfur dioxide. Forms a clear yellow solution containing very minute suspended particles of sulfur; the addition of alum immediately precipitates the sulfur.
Industry:Mining
Amorphous sulfur in a finely divided condition. Prepared by the action of dilute sulfuric acid on sodium thiosulfate or by the reaction of hydrogen sulfide and sulfurous acid. Also prepared by mixing equivalent solutions of hydrogen sulfide and sulfur dioxide. Forms a clear yellow solution containing very minute suspended particles of sulfur; the addition of alum immediately precipitates the sulfur.
Industry:Mining
Amount of diamond material lost or worn away by use in a drill bit, expressed in carats.
Industry:Mining
Amount of mechanical energy that can be transformed into a single heat unit; the equivalent of 778 ft.lbf/Btu (1,000 N.m/kJ).
Industry:Mining
An "acoustic log" showing the interval-transit time of compressional seismic waves in rocks near the well bore of a liquid-filled borehole. Used chiefly for estimating porosity and lithology.
Industry:Mining
An 11-in-long (28-cm-long), 3-lb (1.4-kg) clamshell-type snapper attached to the bottom of a sounding lead by means of a hole drilled in the lead. The jaws are cast bronze and are actuated by a spring. The jaws are held open by engaging two trigger pins within the jaws. The mud snapper and sounding lead may be operated in shallow water by hand lowering or by lowering from a bathythermograph or oceanographic winch.
Industry:Mining
An 18th-century term for a science accounting for the origin, distribution, and sequence of minerals and rocks in the Earth's crust. The term was superseded by geology as early ideas were abandoned. It has become restricted to absolute knowledge of the Earth, as distinct from the theoretical and speculative reasoning of geology.
Industry:Mining
An 8-h or 10-h time-weighted average or ceiling of exposure to coal dust concentration; recommended by NIOSH and based on an evaluation of the health effects data.
Industry:Mining
