- المجال: 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 ...
A maceral of coal within the exinite group, consisting of resinous compounds, often in elliptical or spindle-shaped bodies representing cell-filling matter or resin rodlets. Compare: cutinite; sporinite.
Industry:Mining
A maceral of coal within the inertinite group, consisting of the sclerotia of fungi or of fungal spores characterized by a round or oval form and varying size.
Industry:Mining
A maceral of coal within the vitrinite group, consisting of homogeneous jellified and precipitated plant material, lacking cell structure and of middle-range reflectance under normal reflected-light microscopy.
Industry:Mining
A maceral of the exinite group consisting of spore exines generally much flattened parallel to stratification. Compare: cutinite See also: resinite
Industry:Mining
A machine capable of rotating at high speed, equipped with a thin metal disk having diamonds inset in its edge. Used somewhat like a bench saw to cut core longitudinally into sections. Compare: core splitter; diamond-saw splitter.
Industry:Mining
A machine comprising a stationary cylinder into which the sand is charged. Inside this cylinder is fitted a main shaft onto which are bolted retaining discs whose main function is to prevent the loose ball in between each disc from traveling laterally. As the discs rotate on the shaft, the lumpy sand is moved into contact with the balls, which crush the sand to grain size.
Industry:Mining
A machine consisting essentially of a flexible hose fed by a powerful blower. It is used in forcing rock dust, usually powdered limestone, onto the floor, walls or ribs, and rooms and entries of a mine, thereby making the coal dust nonexplosive.
Industry:Mining
A machine consisting of a gearing and a carborundum wheel for cutting and trimming marble slabs.
Industry:Mining
