- 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 pasty mass of iron produced in a bloomery or puddling furnace. Compare: looping
Industry:Mining
The path from the face to the loading point taken by the scraper of a scraper loading unit.
Industry:Mining
The patio process, dating back to the 16th century, was a crude chemical method for the recovery of silver by amalgamation in low heaps with the aid of salt and copper sulfate (magistral).
Industry:Mining
The pattern of distribution of chemical elements, esp. trace elements, in the wall rocks of an orebody or in the surface materials surrounding it. Compare: aureole; halo.
Industry:Mining
The pattern of stream drainage in a region underlain by horizontally bedded rock, in which the valleys extend in many directions without systematic arrangement and have a dendritic (treelike) arrangement.
Industry:Mining
The pattern to which the picks are set in a cutter chain. In this respect, it may be a balanced or an unbalanced cutter chain. Pick lacing is important as it has a bearing on the stability of the machine, on dust formation, and even on dangerous sparking.
Industry:Mining
The pattern, in any given area, in which the net effect of all the dynamic forces concerned in the movement of earth materials will be reflected in the overall pattern of distribution of the elements.
Industry:Mining
The penetration speed of a drill related to the size of the hole and bit, mud pressure, speed of rotation, weight on bit, etc. From the results, which are plotted as penetration curves, the thickness of coal and dirt bands in the borehole can be determined with reasonable accuracy.
Industry:Mining
The percent of carbon dioxide that would appear in the flue gases if combustion were perfect. Varies with the fuel.
Industry:Mining
The percentage charge of resistance divided by the percentage strain. For strain gages in common use, this amounts to about 2.2.
Industry:Mining
