- 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 single, large mass consisting of a succession of mountains or narrowly spaced mountain ridges, with or without peaks, closely related in position, direction, formation, and age; a component part of a mountain system or of a mountain chain.
Industry:Mining
A single, unrailed, heavy plank, mounted above the drill platform in the derrick or tripod and serving as a walkway or work platform.
Industry:Mining
A single-acting engine in which the power for pumping operations was transmitted through the action of a cumbersome beam.
Industry:Mining
A single-acting engine in which the power for pumping operations was transmitted through the action of a cumbersome beam.
Industry:Mining
A single-chain conveyor with an open side to facilitate power loading.
Industry:Mining
A single-lift dredge with stacker. Buckets, which are closely spaced, deliver to a trommel. The oversize is piled behind the dredge by a conveyor (stacker). Undersize is washed on gold-saving tables on the deck; tailings discharge astern through sluices.
Industry:Mining
A single-shot borehole-surveying instrument that records the compass bearing and inclination of the course of a borehole through the action of a strong beam of light directed through the plumb bob onto a light-sensitive paper disk. It is similar to, but larger than, a type-D drift indicator.
Industry:Mining
A single-shot borehole-surveying instrument utilizing photographic paper on which is recorded the compass bearing and inclination of the course of a borehole. The type-D instrument, when mounted in a special thin-walled protective container, is small enough to be used in an AX-size hole.
Industry:Mining
A single-stroke, compressed-air cylinder for closing rivets through the medium of a toggle mechanism.
Industry:Mining
A single-track haulage system operated by a haulage engine with two drums, each with a separate rope. The engine is usually located at the out end of the system. The main rope is attached to the out end of the set of tubs, and the tail rope passes around a sheave in, and is then attached to, the rear end of the set. To draw the full set out, the main rope is wound in, the tail rope being allowed to run free. To draw the empty set in, the tail rope is wound in, the main rope being allowed to run free. The tail rope is equal to twice the length of the haulage road. The main-and-tail haulage is adopted when the gradient is irregular and the empty set will not run in by gravity.
Industry:Mining
