20 Terms
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Mineral mining
The extraction of valuable minerals or other geological materials from the earth for economic interests.
Industry: Mining
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Mineral mining
Wedge-and-sleeve bolt
Mining; General mining
A bolt designed for use in roof bolting. It consists of a rod 1-3/4 in (4.45 cm) in diameter with one end threaded and the other end shaped to form a solid wedge. A loose split sleeve with an outside ...
Strata bolt
Mining; General mining
A bolt or rod, from 2 to 5 ft (0.6 to 1.5 m) or more in length, set in drill holes in the strata for the support of curbs, skeleton tubbing, helical steel supports, etc., in shafts and staple shafts. ...
T-bolt
Mining; General mining
A bolt with a T-shaped head, made to fit into a T-shaped slot in a drill swivel head; by means of it the swivel head can be turned to any angle of inclination to drill a borehole. Also, a similar ...
Scorifier
Mining; General mining
A bone ash or fireclay crucible somewhat larger than a cupel; used in assaying and in the metallurgical treatment of precious metals.
Logbook
Mining; General mining
A book in which the official record of events or the type and characteristics of the rock penetrated by the borehole is entered.
Waste-heat boiler
Mining; General mining
A boiler that uses the heat of exit gases from furnaces to produce steam or to heat water.
