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United States Bureau of Mines
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 ...
Nonelectric, short-interval (millisecond, ms) delay device for use in delaying a blast; initiated by detonating cord.
Industry:Mining
Nongelatinous permissible explosive; used in coal mines.
Industry:Mining
Nongelatinous permissible explosive; used in coal mining.
Industry:Mining
Nonisentropic adiabatic compression in a wave traveling at greater than local sound velocity.
Industry:Mining
Nonpolarizable electrode consisting of a metal bar immersed in a saturated electrolytic solution which is contained in a porous pot.
Industry:Mining
Normal zirconium phosphate, ZrP<sub>2</sub>O<sub>7</sub>, has a reversible inversion at 300 degrees C and at 1,550 degrees C dissociates into zirconyl phosphate, (ZrO)<sub>2</sub>P<sub>2</sub>O<sub>7</sub>, with loss of P<sub>2</sub>O<sub>5</sub>as vapor. Zirconyl phosphate is stable up to about 1,600 degrees C and has a very low thermal expansion--1 x 10<sub>-6</sub>(20 to 1,000 degrees C).
Industry:Mining
Normally used by drillers to denote feed ratios.
Industry:Mining
Not formed or deposited in strata; specif. said of massive rocks or sediments with an absence of layering, such as granite or glacial till.
Industry:Mining
Not quite vitreous.
Industry:Mining
Not respirable; not fit to be breathed. Said of mine gases.
Industry:Mining
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