- 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 machine that applies a spray under pressure on mine timber supports to preserve and fireproof them. It may also be used for limewashing and water spraying of dust. The machine is mounted on wheels and operated by compressed air.
Industry:Mining
A machine that combines coal crushing and screening. It consists of a revolving cylindrical screen 8 to 14 ft (2.4 to 4.3 m) in diameter and 13 to 22 ft (4.0 to 6.7 m) in length. It breaks the coal by gravity impact. On reaching the desired size, the coal is 393 discharged through the plates. It can deal with run-of-mine coal up to 12 in (30.5 cm) at a rate of 500 to 600 st/h (454 to 544 t/h), to give a product size of below 1-1/2 in (3.8 cm); other sizes can be produced, depending on the screen plates used.
Industry:Mining
A machine that crushes ripping stone in headings and projects it through a pipe into gate side packs. It may also be used for filling old roadways or roof cavities.
Industry:Mining
A machine that is safe in itself, without having to be placed inside a flameproof enclosure. It implies that the machine cannot produce any spark that is capable of igniting mixtures of combustible gases and air in mines.
Industry:Mining
A machine that mixes the dry ingredients for a grout with water and injects it, under pressure, into a grout hole. Compare: grout machine
Industry:Mining
A machine that separates coal from associated impurities in run-of-mine material.
Industry:Mining
A machine that takes over the work of size reduction from blasting operations; may be a gyratory or jaw breaker. Its capacity must be greater than the overall crushing plant capacity. In mines, primary ore crushing to about 7 in (18 cm) may be performed underground.
Industry:Mining
A machine that unloads iron ore from boats and cars, by power, generally electric.
Industry:Mining
A machine that will make a shear cut as well as a horizontal cut. The central column is wedged tightly between roof and floor and operates similarly to a radial percussive coal cutter.
Industry:Mining
