- 行业: Mining
- Number of terms: 33118
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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 term used when two positive wires are installed in divergent directions but later come close enough together to be connected. They then form a series or so-called loop circuit. Compare: parallel blasting circuit.
Industry:Mining
A term used with any device used to change the direction of a shaker conveyor trough line; e.g., curved trough turn, adjustable angle turn, right angle turn, etc. The angle turn corresponds to the bell crank drive in principle of operation.
Industry:Mining
A term used with reference to instantaneous caps to describe the time between the bridge break and the detonation of the base charge.
Industry:Mining
A term which has been proposed (instead of Westphalian) for the Coal Measures strata between the Lanarkian and the Staffordian.
Industry:Mining
A term which is applied arbitrarily to anything phosphatic that is not distinctly hard rock.
Industry:Mining
A term, often used interchangeably with hydrogeology, referring to the hydrologic or flow characteristics of subsurface waters.
Industry:Mining
A terminal connection, with a fuse, used on portable electrical mining machinery.
Industry:Mining
A terrain coefficient is a number expressing the ratio of actual ground displacement by elastic waves to that which the same waves would produce in rock. The terrain coefficient for rock is thus 1; for unconsolidated materials it ranges upward to as high as 30, depending on the thickness of the material.
Industry:Mining
A terrane whose spatial and genetic relations with respect to adjacent terranes during their time of formation is unknown or uncertain. Inasmuch as most terranes fall into these categories, the term may be considered redundant.
Industry:Mining
A test by which crystals and crystalline gemstones can be distinguished from glass that feels warmer in comparison when held to the tongue because of its lower thermal conductivity.
Industry:Mining
