- 行业: 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 ...
Small pack of timber consisting of a number of timbers laid side by side to form a solid mass 2 to 2-1/2 ft square by 4 to 6 in thick (approx. 0.7 m square by 10 to 15 cm thick). Holes are drilled edgeways through the mat, and wires are threaded through to hold it together. Mats are transported underground and built up to form very effective supports.
Industry:Mining
Small pebbles of a banded garnet-quartz rock; usually associated with diamond in the concentrate obtained when washing the diamond-bearing gravels from the Vaal River in the Republic of South Africa. The occurrence of bantams in a gravel deposit is considered a good indicator of diamond.
Industry:Mining
Small plummet, so adjusted as to density that by rising or falling it can be used to show whether specific gravity of pulp is above or below a desired control point. If pulp is opaque, diver can initiate magnetic signal, or in a pulp containing magnetic material can carry radioactive marking material.
Industry:Mining
Small solid particles suspended in a liquid; they exhibit the Brownian movement and do not settle by themselves, but can be readily coagulated.
Industry:Mining
Small triangular facet situated between the bezel facets and the table on the crown of an American (Tolkowski theoretical) brilliant-cut diamond.
Industry:Mining
Small veins having an intermediate bearing between strike and cross veins.
Industry:Mining
Small, rounded particles of native copper, molded by the shape of vesicles in basaltic host rock, and resembling shot in size and shape.
Industry:Mining
Small, shaped metallic slugs inset with diamonds designed to be brazed or welded into slots or depressions machined in a metal bit or reaming-shell blank.
Industry:Mining
Small, solidified drops of volcanic glass behind which trail pendants of Pele's hair. They may be tear shaped, spherical, or nearly cylindrical. Etymol: Pele, Hawaiian goddess of fire.
Industry:Mining
