- 行业: Mining
- Number of terms: 33118
- Number of blossaries: 0
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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 ...
Used by the soil and foundation testing profession as a syn. for boreholes and/or the materials removed from a borehole. Compare: cuttings; sample.
Industry:Mining
Used for attaching ironwork to timber. The nut is a plate with teeth, which bite into the wood. To tighten, the bolt is turned while the nut remains stationary.
Industry:Mining
Used for investigating strata beneath the seabed and taking sample and cores from which dredging conditions may be assessed.
Industry:Mining
Used for lining shafts, winzes, and rises; usually constructed of comparatively thin steel sheeting, stiffened around the edges with angles. Plates should be of such size that they can be conveniently handled in the skips or buckets used for sinking.
Industry:Mining
Used for rough dressing stones. It has one blunt end and one cutting end.
Industry:Mining
Used for separating fine-size solids from coarser solids in a wet pulp; consists of an interrupted-flight screw conveyor operating in an inclined trough.
Industry:Mining
Used in a general sense as a syn. for core analysis; core assay. In a strict sense, the term should not be used to designate the mineral content of the core sample unless the valuable mineral is gold, silver, platinum, etc.
Industry:Mining
Used in a weak or scaly top in narrow rooms or entries that have short life. It is done by placing lagging bars running parallel with the working place above the header. It has limited uses because of necessary additional height and because its weight rests on the center of the header.
Industry:Mining
Used in explosives and as a fertilizer. NH<sub>4</sub>NO<sub>3</sub>; mol wt, 80.04; colorless.
Industry:Mining
Used in large water mains, in which sheet lead is forced tightly into the bell of a pipe by means of the hydrostatic pressure of a liquid.
Industry:Mining
