- 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 ...
Draining a mine by means of two or more pumps placed at different levels, each of which raises the water to the next pump above or to the surface.
Industry:Mining
Drawn from hollow ingots, or otherwise, on mandrels of successively decreasing diameters; said of certain seamless metal tubes.
Industry:Mining
Drift in stope block above haulage level, down which scraper loader conveys broken ore to loading chutes, which are usually without gates.
Industry:Mining
Drift peat of lacustrine character. It is subdivided into Gyttja type and Dry type.
Industry:Mining
Drill cuttings that are not collected or saved as a sludge sample and are allowed to collect in the sump; also, the return drill-circulation fluid not returned to a sump for recirculation.
Industry:Mining
Drill fluid that reaches the surface and overflows the borehole collar after it has been circulated downward through the rods and past the drill bit.
Industry:Mining
Drill holes converge, so that a core is blasted out. This leaves an open or relieved cavity or free face for the following shots, which are timed to ensue with a fractional delay.
Industry:Mining
Drill machine and equipment in place at a drill site and ready to start drilling.
Industry:Mining
Drill rod having couplings that are nearly flush on the inside and designed so that the inner tube of a wire-line core barrel and overshot assembly can be run inside the rod.
Industry:Mining
