- 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 ...
In mining, the system of dividing a ventilating current into three coursings.
Industry:Mining
In mining, training given to all miners at least once a year consisting of 8 hours of instruction reviewing the essentials of new miner training. Compare: new miner training; task training.
Industry:Mining
In Missouri, calcite stained with carbonaceous material; sometimes dark enough to be mistaken for sphalerite.
Industry:Mining
In most cases, an opaque, lustrous, elemental substance that is a good conductor of heat and electricity. It is also malleable and ductile, possesses high melting and boiling points, and tends to form positive ions in chemical compounds.
Industry:Mining
In nautical and aeronautical navigation, the continually changing acute angle between the direction of the magnetic and geographic meridians. The term "magnetic variation" is preferred.
Industry:Mining
In New York and Pennsylvania, a bluestone quarryman's term for a mass of waste situated between two closely spaced open joints.
Industry:Mining
In observed or recorded data, the fluctuations not attributable to signals.
Industry:Mining
