- 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 method employed for the determination of the apparent specific gravity of coal and coke.
Industry:Mining
The method in which pulp is classified to remove the sands, and the resin adsorbs the metal directly from the slime pulp without the necessity of thickening or filtering. It is esp. adapted for ores that do not settle readily, and where thickening and filtration are difficult.
Industry:Mining
The method of connecting electric blasting caps in such a way that the two free ends can be connected at one end of the line of holes.
Industry:Mining
The method of excavating a tunnel by driving a small tunnel ahead, and then enlarging its dimensions.
Industry:Mining
The method of hoisting in small one-compartment shafts where only one cage is in operation, as opposed to balanced winding.
Industry:Mining
The method of quarrying a rock ledge in a series of successive benches or steps.
Industry:Mining
The method of shovel operation in which no ground is hauled away. The shovel simply stacks the ground on the opposite side from the working cut, or it may turn entirely around, dumping the spoil on a bank behind.
Industry:Mining
The method or equipment for determining, by underwater sound, the presence, location, or nature of objects in the sea. The word sonar is an acronym derived from the expression SOund NAvigation and Ranging.
Industry:Mining
The method used for the separation and the purification of soda ash (anhydrous sodium carbonate), anhydrous sodium sulfate, boric acid, borax, potassium sulfate, bromine, and potassium chloride from brine at Searles Lake, San Bernardino County, CA.
Industry:Mining
The methods of testing twin-core and single-core cables are identical. Two tests are applied, one for insulation and one for continuity, and where large and important charges are being fired, as in tunnel, wellhole, and quarry blasts, tests are made before every blast. For the cable insulation test, an approved circuit tester or ohmeter is connected to one end of the cable, the two conductors at the other end being separated. No current should flow, and the resistance should be infinite. For the continuity test, the two far ends of the cable should be joined. The tester should show that the current is complete, or if an ohmeter is used, this should show the correct resistance of the shot-firing cable.
Industry:Mining
