- Industri: 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 ...
A saw made from a coarsely notched blade of soft iron and provided with a wooden back; it is used, with sand, for sawing stone by hand.
Industry:Mining
A saw that is run at a high rate of speed and has a fusing action at its cutting edge; used in cutting hot ingots.
Industry:Mining
A saw using an uncharged blade, usually steel, which runs in a bath or stream of carborundum abrasive. Also known as a mud saw.
Industry:Mining
A scaffold or staging designed for use during shaft sinking, particularly during lining operations.
Industry:Mining
A scale for rating earthquake effects. Devised in 1878 by de Rossi (Italy) and Forel (Switzerland). No longer in general use, having been supplanted by Wood and Neumann's Modified Mercalli intensity scale of 1931.
Industry:Mining
A scale of hardness of rocks as determined by the Shore scleroscope test. The scale avoids the limitation of Mohs' scale of hardness and gives better assessment of rock hardness.
Industry:Mining
A scale of resistance to abrasion based on the following method: if specimens of different materials are mounted so that they present surfaces substantially in the same plane, and if the surfaces are subjected to a lapping operation with a properly selective abrasive, the harder materials will stand out in relief, whereas the softer ones will be cut or worn to a depth, depending upon their hardness. By averaging several readings, a scale of hardness was established by which the quantitative values of the hardness of various materials could be determined. On the Woodell scale, diamond has approx. 2 times the hardness of boron carbide, 3.5 times that of tungsten carbide, and nearly 5 times that of corundum.
Industry:Mining
