- 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 ...
Velocity in a dilute solution of an ion where the potential difference across this is 1 V/cm. For hydrogen ions, the velocity is 0.00326 cm/s.
Industry:Mining
Ventilation by a current of air traveling in the opposite direction to that of the flow of mineral out of the mine.
Industry:Mining
Ventilation by a current of air traveling in the same direction as the flow of mineral out of a mine.
Industry:Mining
Ventilation of the drives and headings in mines by use of the pressure gradient of the main air current.
Industry:Mining
Vertical angle through which a freely suspended magnetic needle dips from horizontal.
Industry:Mining
Vertical distance from crest of berm to its underlying toe, as in a bank or bench.
Industry:Mining
Vertical screw elevators are used for handling pulverulent materials. A typical installation for delivering bulk cement into a plant consists of a screw feeder, which takes the cement from the bulk-cement car and feeds it to the screw elevator. Both these units are airtight and all joints are fitted with rubber gaskets that prevent the loss of cement and render the operation dustproof.
Industry:Mining
Vertical-current separator (obsolete) used to separate shale from coal.
Industry:Mining
