- 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 ...
Method of smelting galena concentrates in a reverberatory furnace with a crucible well in its hearth.
Industry:Mining
Method of soil consolidation used in tunneling through sands and gravels. Solutions of calcium chloride and sodium silicate are forced into the ground, where they mingle and produce a watertight gel.
Industry:Mining
Method of surface mining in which the overburden is hauled from over the ore or coal in trucks to a holding area and hauled back after the ore or coal has been removed.
Industry:Mining
Method of testing small grains of minerals to ascertain their response to flotation collector agents. A bubble of air is pressed down on particles under water, and then raised and examined to find whether it has lifted any grains. This is often done by using a single bubble device for determining fundamental aspects of the mineral-bubble interaction.
Industry:Mining
Method used in flattish Rand stope panels 500 to 1,000 ft (152 to 305 m) long for breaking and moving ore. Stope is divided into 20-ft (6.1-m) panels, each worked by its own gang. A light tramming system delivers severed rock to a central scraper system.
Industry:Mining
Method used in machine mining where a coal cutter makes a cut along the face in front of a cutter loader. It may be adopted in hard coal seams or where an improvement in the +2-in (+5.1-cm) coal product is required.
Industry:Mining
Method used to remove soluble constituents remaining within a heap leach pile after the metals concentration decreases to levels below economic limits. Simple water rinsing, chemical, or biological techniques or combinations thereof may be employed.
Industry:Mining
Method whereby a mine, or a group of mines, served by a common mill, sends ores of slightly varied character for treatment and separate bins or stockpiles are provided. From these, regulated percentages of ores are drawn and blended to provide a steady and predictable feed to the mineral dressing plant.
Industry:Mining
Methods of working coal seams, which have been given different names in different coalfields, such as stoop-and-room in Scotland; bord-and-pillar in Durham, England; and single and double stalls in South Wales. There are many modifications of pillar mining, but in general, there are two stages: (1) the driving of narrow roadways and thus forming a number of coal pillars, and (2) the extraction of the pillars--often on the retreating 2336 system. Pillar methods of mining are widely used in the United States, while the longwall method is favored in Great Britain. Pillar methods also are used for working stratified deposits of ironstone, rock salt, slate, and other layered minerals.
Industry:Mining
