- Industry: 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 shaft furnace, filled with terraces or shelves, through which crushed ore is caused to fall for roasting.
Industry:Mining
A shaft in which the upper stage is often a vertical shaft, while the lower stage, or stages, may be inclined and driven in the deposit. In this type of shaft, underground winding engines are installed to deal with the lower stages, with transfer points and ore bins at the junction of two stages.
Industry:Mining
A shaft made for sending down rock for filling the stopes, etc., generally kept nearly full, the rock being trammed away as needed.
Industry:Mining
A shaft sunk at an angle of 90 degrees with the horizon or directly downward toward the center of the Earth.
Industry:Mining
A shaft sunk at an inclination from the vertical, usually following the dip of a lode.
Industry:Mining
A shaft sunk from an adit, tunnel, or working level, through which mining operations are conducted. The upper end terminates underground. A winze or raise becomes an underground shaft when equipped and used for hoisting and the conduct of other mining operations. Compare: winze
Industry:Mining
A shaft sunk vertically in the hanging wall block until it intersects a reef, after which it is sunk down at an angle in the footwall parallel to the reef. This unusual practice is sometimes adopted on the Rand because it enables the mine to become productive at an earlier stage.
Industry:Mining
