- 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 range of hills produced by differential erosion from inclined sedimentary rocks; a cuesta. Compare: cuesta
Industry:Mining
A rapid plow for use on longwall faces. It is suitable for seams from 2 to 8 ft (0.6 to 3.9 m) thick, with reasonably good roof and floor. The plow travels along the face at a speed of 75 ft/min (22.9 m/min) with a cutting depth from 1-1/2 to 3 in (3.8 to 7.6 cm); the broken coal is loaded by the plow-shaped body onto an armored conveyor. The machine can be operated independently of the face conveyor.
Industry:Mining
A rapid tunneling procedure, consisting of a combined drill carriage and manifold for water and air so that immediately when the carriage is at the face, drilling may commence with no lost time for connecting up, waiting for drill steels, etc. The air is supplied at pressures of 95 to 100 psi (655 to 690 kPa).
Industry:Mining
A rare earth that, together with zirconia and silica, produces a distinctive and stable yellow color for pottery decoration.
Industry:Mining
A rare hydrous zinc arsenate, Zn<sub>2</sub>(AsO<sub>4</sub>)(OH) , occurring granular or in crusts and crystallizing in the orthorhombic system. Weakly radioactive; variable color--yellowish, greenish, or violet, rarely colorless or white; found in the oxidized zone of zinc orebodies. Associated with smithsonite, calcite, malachite, hemimorphite, limonite, and azurite. Small amounts of uranium have been found in some specimens of adamite.
Industry:Mining
A rare monoclinic mineral, BaAl<sub>2</sub>Si<sub>2</sub>O<sub>8</sub>; feldspar group; the barium analog of anorthite; dimorphous with paracelsian.
Industry:Mining
