- 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 line that has the properties of both constant pressure and constant height above mean sea level. Therefore, it can be any contour line on a constant-pressure chart, or any isobar on a constant-height chart.
Industry:Mining
A line that pulls a drag scraper bucket backward from the dump point to the digging.
Industry:Mining
A line used to skid a drill rig from place to place using a block and tackle or cable, one end of which is attached to a deadman and the other wrapped around the hoisting drum.
Industry:Mining
A linear area inby the last solid ground, in a longwall-type mine, where the roof or back caves behind the retreating excavation.
Industry:Mining
A linear arrangement of sensors used to record reflections over a large range of shot-togeophone distances, which is used to determine seismic velocity from the time-distance relationship.
Industry:Mining
A linear structure, usually of earth or gravel, constructed so as to extend above the natural ground surface and designed to hold back water from overflowing a level tract of 1079 land, to retain water in a reservoir, tailings in a pond, or a stream in its channel, or to carry a roadway or railroad; e.g., a dike, seawall, or fill.
Industry:Mining
A lineation of crystals, mineral streaks, or inclusions in an igneous rock, indicating the direction of flow before consolidation. Compare: flow layer
Industry:Mining
A lining for furnaces, converters, etc., formed of nonsiliceous material, usually limestone, dolomite, lime, magnesia, or ferrous oxide.
Industry:Mining
A lining that has high refractory qualities and is therefore suitable for furnace linings and boiler foundations. It is made from a good-quality refractory ore, clay, fireclay, or gannister.
Industry:Mining
A liquid consisting of eight parts of white phosphorous and eight parts of sulfur to one part of methylene iodide. Useful in obtaining the refractive index by the Becke method. Refractive index, 2.05.
Industry:Mining
