- 行业: Mining
- Number of terms: 33118
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- 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 ...
The place on an incline where there is a sudden change in grade. The top of a grade or hill on a track over which mine cars are hauled.
Industry:Mining
The place where batch materials are received, handled, weighed, and mixed, for delivery to melting units.
Industry:Mining
The placement of a number of boreholes in accordance to a predetermined geometric arrangement.
Industry:Mining
The placing of alternate samples of coal or ore in different containers that are then analyzed separately. Each container thus holds a representative subsample taken at intervals throughout the sampling intervals or period.
Industry:Mining
The placing of pots, containing either potassium nitrate or sodium nitrate and sulfuric acid, in the kilns used in the manufacture of sulfuric acid from sulfurous acid obtained from the combustion of sulfur in air.
Industry:Mining
The placing of safety posts at the working face to support the roof of the mine. The safety post is the most important timber in a mine because exposure is greater at this point than at any other since the newly exposed top is always of unknown quality.
Industry:Mining
The placing of the detonator in the last cartridge to be inserted in the shothole with the active end of the detonator pointing inward. This position tends to minimize the risk of gas ignition.
Industry:Mining
The plane along which a diamond crystal can be split easily. The four planes paralleling the faces of an octahedron are those generally referred to as the cleavage planes, or diamond cleavage. All crystalline diamonds are more or less brittle and will be fractured by a sufficiently violent blow, but the irregular surface of a fracture cannot be mistaken for the brilliant flat surface produced by cleaving. The carbon has no cleavage, and in ballas cleavage is absent or very poorly defined.
Industry:Mining
