- 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 ...
The old doctrine that all mineral wealth was the prerogative of the crown or the feudatory lord. The concession system, in which the state or the private owner has the right to grant concessions or leases to mine operators at discretion and subject to certain general restrictions, had its origin in this doctrine. Almost all mining countries of the world, except the United States, follow this system.
Industry:Mining
The old fabulous deposit, discovered in surface croppings, easy of exploitation, and capable of financing its own development as it went along.
Industry:Mining
The oldest of the systems into which the Paleozoic stratified rocks are divided; also, the corresponding oldest period of the Paleozoic era.
Industry:Mining
The one of a pair of parallel headings that is kept a short distance in advance of the other.
Industry:Mining
The one of a pair of parallel headings that is kept a short distance in advance of the other. This may be adopted to drain the water and thus secure one dry heading. The term is also applied to a heading that is driven in the solid coal in advance of the general line of face.
Industry:Mining
The one-hundredth part of a poise, an absolute unit of fluid viscosity. Viscosity of drillmud fluid is sometimes expressed in centipoise or millipascal-second units.
Industry:Mining
The only crystalline phase capable of existing in equilibrium with a given liquid; it is the first to appear on cooling from a liquid state and the last to disappear on heating to the melting point.
Industry:Mining
The only pin in an integrated crawler track that will open the track when driven out.
Industry:Mining
