- 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 ...
The different sizes depending upon the type of limestone, kind of kiln used, or treatment subsequent to calcining. The sizes commonly recognized are as follows: (1) large lump-- 8 in (203 mm) and smaller; (2) pebble or crushed--2-1/2 in (64 mm) and smaller; (3) ground, screened, or granular--1/4 in (6.4 mm) and smaller; and (4) pulverized-- substantially all passing a No. 20, 850 mu m, sieve.
Industry:Mining
The differential stress that a material sustains at the instant of breaking, or rupture. The term is normally applied when deformation occurs at atmospheric confining pressure and room temperature.
Industry:Mining
The dilution and settling of sediment in a cloud as it advects from a point source.
Industry:Mining
The dimension or dimensions of the aperture in a screen deck, usually with a qualification as to the shape of aperture; e.g., round-hole, square-mesh, and long-slot.
Industry:Mining
The dimensionless ratio Epsilon /d (where Epsilon is the average height of the surface irregularities and d is the diameter of the pipe) is termed the relative roughness. The physical interpretation of this functional equation is that the friction factors of pipes are the same if their flow patterns in every detail are geometrically and dynamically similar. 2598 The term Epsilon indicates the height of the irregularity above the boundary surface only; hence it is apparent that, dependent upon the thickness of the boundary layer adjacent to the surface, the projection can either lie submerged within the boundary layer or else project outside it.
Industry:Mining
The dip of a rock layer as measured in any exposed section, or direction, not at a right angle to the strike. It is a component of, and hence always less than, the true dip.
Industry:Mining
The direct discharge of ground water from the zone of saturation, as via springs, wells, or infiltration ditches or tunnels.
Industry:Mining
The direction along a plane on which a diamond can be most easily abraded.
Industry:Mining
The direction at right angles to the main cleavage planes. In some mining districts it is termed "on face."
Industry:Mining
