- 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 ...
A team of trained mine rescue workers, from five to eight strong; they operate after explosions, and during and after mine fires.
Industry:Mining
A team of workers employed at the face on production, covering all face operations, maintenance, and supplies.
Industry:Mining
A team of workers, from five to eight strong, trained in the use of breathing apparatus and in rescue operations after colliery explosions or mine fires. The team trains every week or so at a rescue station.
Industry:Mining
A technical investigation of the essential movements of a worker when performing a specific task, and assessing the results with the objective of reducing labor and increasing work performance. The study may also include the layout tasks, availability of tools or materials, and the design of new methods.
Industry:Mining
A technical officer who examines processes, methods, and operations in a mine, mill, or smelter, and connecting links, with a view to their improvement of maintenance at an agreed operating standard.
Industry:Mining
A technique being used abroad to suppress or prevent the formation of dust, in advance of mining a coal seam. Water (or sometimes foam or steam, which is costlier but more effective) is injected into the coal ahead of the face through long drill holes, as many as four to six per face and 6 to 20 m in length. The liquid infuses into the seam along fractures and cracks and, under pressure, penetrates a considerable distance from the hole radially, wetting the coal well. It has proved very effective in reducing dust concentrations during subsequent mining--in some instances, as much as 80%. Water infusion originated in Great Britain (it is used in 25% of the dusty mines) and has been tried experimentally with some success in the United States.
Industry:Mining
A technique developed by Auguste V.L. Verneuil (1856-1913), French mineralogist and chemist, for the manufacture of large crystals of corundum and spinel in which powdered alumina with appropriate oxide dopants is melted in an oxyhydrogen flame to produce boules of synthetic gems.
Industry:Mining
A technique developed for deep-hole drilling in esp. strong and abrasive rocks. In this method, a series of small underwater explosions are used to break the rock at the bottom of the hole, the fragments from each explosion being washed away by the flushing water.
Industry:Mining
A technique for testing the validity of a variogram model by kriging each sampled location with all of the other samples in the search neighborhood, and comparing the estimates with the true sample values. Interpretation of results, however, can often be difficult. Unusually large differences between estimated and true values may indicate the presence of "spatial outliers," or points that do not seem to belong with their surroundings.
Industry:Mining
