- 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 ...
One of the three main size groups by which coal is sold by the National Coal Board in Great Britain. It consists of coal screened between two screens--with an upper and lower limit ranging from a top size of 1-1/2 to 2 in (38 to 51 mm) to a bottom size of 1/8 to 3/4 in (3.2 to 19 mm).
Industry:Mining
Contracted version of microwave amplification by simulated emission of radiation. A class of amplifier from which the optical laser was developed.
Industry:Mining
Material sufficiently mineralized to be economically recoverable by selectively dissolving the wanted mineral in a suitable solvent.
Industry:Mining
Premises registered with the local authority for the storage of not more than 60 lb (27.2 kg) of explosive.
Industry:Mining
Pneumatically applied portland cement mortar, or gunite. The spraying of mine openings with concrete to provide ground support, present a smooth surface to the air current, and prevent weathering with the mortar.
Industry:Mining
In batch tests of small quantities of ore during development of a method of concentration, the retention of selected fractions (usually middlings) for admixture with fresh samples. Used to study effect of recycling minerals or solutions, which they may have contaminated; also, to observe effects of increased concentration of such compounds on the process as a whole.
Industry:Mining
Mining toward the main shaft while extracting ore or coal, such as in longwall retreating.
Industry:Mining
Compact machine, driven by compressed air or electricity, that cuts into the coal face with its jib at right angles to its body.
Industry:Mining
Gr. Brit. The period when face workers are idle due to the lack of empty cars, etc. Payments are made to miners on piecework for time lost.
Industry:Mining
