- 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 ...
A pan used by prospectors for washing gold-bearing materials and extracting the gold.
Industry:Mining
A paper bag that is filled with good stemming material such as sand for use in horizontal and upward-sloping holes. Plastic bags are also available for this purpose.
Industry:Mining
A paperlike variety of asbestos occurring in thin sheets; specif. mountain leather or mountain cork.
Industry:Mining
A paradigm of mine waste management (based upon the eventual oxidation of exposed sulfidic rock and mine wastes) that states that a slow release of contamination over time may be superior to complete containment.
Industry:Mining
A parallelepiped unit of atomic dimensions within a crystal structure, containing all the atoms in the chemical unit in definite, fixed positions; and all the symmetry elements of the space lattice from which the whole crystal or crystal structure is built by regular repetitions of this unit in three dimensions. Compare: asymmetric unit
Industry:Mining
A parallelepiped with each face a rhombus. Dolomite crystallizes as rhombohedra, and members of the calcite group cleave as rhombohedra. Adj. rhombohedral.
Industry:Mining
A parallelogram that does not have any right angles, and one pair of opposite sides differ in length from the other pair of opposite sides.
Industry:Mining
A parallelogram that does not have any right angles, but the sides are all equal in length.
Industry:Mining
A part of a mine that has been sealed off from the rest of the mine. The object of sealing off a fire area is to: (1) contain the trouble, and to prevent an explosion that may occur inby from extending to other parts of the mine; (2) build up an extinctive atmosphere inside the sealed-off area; and (3) prevent the access of air to the inby side of the seal.
Industry:Mining
A part of a rectifier unit with its auxiliaries that may be operated independently.
Industry:Mining
