- 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 ...
Evaluating coals by methods other than chemical, such as determining the relative values of different coals as fuels by burning them under controlled conditions in furnaces, or determining their gas- and coke-producing properties by testing in a retort. The term coal testing is frequently erroneously used, esp. in coal marketing, for coal analysis.
Industry:Mining
Every crystal of precise chemical structure and purity has a specific and characteristic shape.
Industry:Mining
Evolved by Professor H. Briggs in 1931 to express the conductance of a waste to air leakage, per foot length of the roadway per foot width of the leakage zone.
Industry:Mining
Excavated material transported and dumped in a heap, generally to preestablished lines and grades. Should be kept free of tree stumps, organic matter, trash, and sod if any future use of the filled area is contemplated.
Industry:Mining
Excavation by means of a high-pressure jet of water, the resulting waterborne excavated material being conducted through flumes to the desired dumping point.
Industry:Mining
Excavation carried out completely underground and limited in width and height.
Industry:Mining
Excavation in which the width of operations and, generally, the depth are limited. Trenching may be performed in any soil and will sometimes fall into the category of limited-area, vertical excavation.
Industry:Mining
Excavation paid for at a fixed price per yard, regardless of whether it is earth or rock.
Industry:Mining
