- 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 contraction of metamorphic diabase, suggested by Dana for certain rocks simulating diabase, but which were possibly produced by the metamorphism of sedimentary rocks. Compare: metadiorite.
Industry:Mining
A contrivance for supplying a furnace with fuel in graduated quantities. A mechanical stoker.
Industry:Mining
A controlled blasting technique used to minimize damage, in which the blasting of small, specially designed rounds over partial faces is used in extremely sensitive situations.
Industry:Mining
A controller used on both steam and electric winding engines that protects against overspeed, overwind, too rapid acceleration, delayed retardation, and against starting in the wrong direction. It also gives warning of overspeed and indicates by a bell signal when retardation should commence.
Industry:Mining
A convection dryer of the forced-draft type. The heat source is a coal-fired furnace. It consists essentially of a declined reciprocating screen over which the coal travels. Two balanced tandem decks are used. They are suspended from the supporting structure by inclined flexible hangers and actuated in opposition through flexible pitmans from a common eccentric shaft. The removal of moisture is accomplished by passing hot furnace gases, tempered with cold air, downward through the bed of coal as it travels along the screen. An induced-draft fan at the exhaust end provides the motive force for the gases.
Industry:Mining
A convex perforated diaphragm fixed at the bottom of a pump tube to prevent the entrance of foreign matter; a strainer.
Industry:Mining
A conveyance of an interest in the minerals in, on, or under a described tract of land. The grantee is given operating rights on the land; easements of access to the minerals are normally implied unless expressly negated.
Industry:Mining
