- 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 ...
The property shown by certain minerals or rocks of fracturing or breaking along jagged surfaces, e.g., broken iron.
Industry:Mining
The proportion of a coal seam that is removed from a mine. The remainder may represent coal in pillars or coal that is too thin or inferior to mine or is lost in mining. Shallow coal mines working under townships, reservoirs, etc., may extract only about 50% of the entire seam, the remainder being left as pillars to protect the surface. Under favorable conditions, longwall conveyor mining may extract from 80% to 95% of the entire seam. With pillar methods of working, the extraction ranges from 50% to 90%, depending on local conditions.
Industry:Mining
The protection of soil or other submerged material against scour, by the use of steel sheet pilings, revetment, riprap, or brushwood, or by combining any such methods as most suited to the site.
Industry:Mining
The provision of two intake airways, generally side by side, to a ventilating area of a mine.
Industry:Mining
The psychrometric properties of air at given conditions, e.g., dry bulb temperature, wet bulb temperature, and barometric pressure.
Industry:Mining
The pulsating effect transmitted to a pipeline or drill string at the completion of each compression stroke of a reciprocating-piston pump.
Industry:Mining
The puncheon between the lowest frame and a foot block in a timbered excavation, used to support the weight of the timbering.
Industry:Mining
