- 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 ...
(South Africa) The area between Boksburg and Heidelburg, Transvaal, limited in the north and east by the outcrops or sub-outcrops of the Main Reef, but not yet limited in the south.
Industry:Mining
(South Africa) The calculated value of ore before crushing. After treatment, there remains a residue of the valuable metal in the sands, slimes, or tailings, which, added to the yield obtained by treatment, should be equal to the mill value.
Industry:Mining
(South Africa) The rock broken during development work in payable ground, which contains both valuable and barren rock and is, therefore, included in the tonnage sent to the reduction plant of a mine.
Industry:Mining
(South Africa) The valuable material obtained from milling, expressed as a percentage or in pennyweights per short ton.
Industry:Mining
(South Africa) The word alone generally denotes vertical depth below the surface. In the case of incline shafts and boreholes, it may mean the distance reached from the beginning of the shaft or hole, the borehole depth, or inclined depth.
Industry:Mining
(South Africa) This term generally denotes the Ventersdorp contact reef, a gold-bearing conglomerate beneath the Ventersdorp lavas and frequently overlying mineralized horizons of the Witwatersrand system.
Industry:Mining
(South Staffordshire, England) A barrel in which water is raised from a shallow shaft.
Industry:Mining
(South Staffordshire, England) A chain hooked to the back of a skip and running around a post to prevent its too rapid descent on an inclined plane. Compare: snub
Industry:Mining
