- 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 ...
The level of water in a well or borehole when pumping is not in progress.
Industry:Mining
The level, salt-encrusted bottom of a lake or pond that is temporarily or permanently dried up; e.g., the Bonneville Salt Flats west of Salt Lake City, UT.
Industry:Mining
The liberation of gas in the form of bubbles during the solidification of metals. It may be due to the fact that the solubility of a gas is less in the solid and liquid metal respectively, as when hydrogen is evolved by aluminum and its alloys, or to the promotion of a gasforming reaction, as when iron oxide and carbon in molten steel react to form carbon monoxide.
Industry:Mining
The lifting arm of a crane or derrick having a pulley at its outer end over which the hoisting rope passes.
Industry:Mining
The lighting of shafts at landing stations is often found to be far from ideal. Work in the cages, during loading and unloading, and examination of shaft gear, are facilitated by the provision of fittings to provide a directional flux distribution in such a way that light is thrown forwards from the pit bottom or inset roadway into the shaft area. There must also be adequate illumination on a vertical plane at the shaft inset.
Industry:Mining
The lightweight cellular material obtained by controlled processing of molten blastfurnace slag with water or with water and other agents, such as steam or compressed air or both.
Industry:Mining
The limit of energy expended or absorbed, within which a body is not unduly fatigued.
Industry:Mining
The limit or limits of particle size used to describe a product of a sizing operation.
Industry:Mining
The limits of percentage composition of mixtures of gases and air (or oxygen) within which an explosion takes place when the mixture is ignited.
Industry:Mining
The line joining the coal face underground and the surface limit of draw; the boundary of a mine.
Industry:Mining
