- Industry: 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 ...
Generally means rapidly cooling metals and alloys, or any substance to below the critical range by immersing it in oil or water to harden it. Also applied to cooling in salt and molten-metal baths or by means of an air blast, and to the rapid cooling of other alloys after solution treatment.
Industry:Mining
Generally of either the flanged-face or the compression type. They are used to connect two shafts to make a permanent joint and usually are designed to be capable of transmitting the full load capacity of the shaft. This coupling has no flexibility, either torsional, angular, or axial, hence it is limited to those installations where rigid connections are suitable, particularly in line shafts and extension shafts.
Industry:Mining
Generally the space between the working face and the area being backfilled.
Industry:Mining
Generally, any airborne particulate matter that is fibrogenic (harmful to the respiratory system), carcinogenic (capable of causing cancer), radioactive, or toxic.
Industry:Mining
Generated elsewhere; applied to those constituents that came into existence outside of, and previously to, the rock of which they now constitute a part; e.g., the pebbles of a conglomerate. Compare: authigenic.
Industry:Mining
Generic term for porphyritic rocks in which the minerals occur in two generations.
Industry:Mining
Generic terms which include the whole mode of obtaining metals and minerals.
Industry:Mining
Genetically related paired sedimentary laminae, generally occurring in repeating series, as varves, but applied to laminated nonglacial shales, evaporites, and other sediments as well.
Industry:Mining
