- 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 ...
A drainage pattern in which the main streams and their tributaries display many rightangle bends and exhibit sections of approx. the same length; it is indicative of streams following prominent fault or joint systems that break the rocks into rectangular blocks.
Industry:Mining
A drainage system in which sewerage and surface water are carried in separate sewers.
Industry:Mining
A drainageway slope determined by the evelation and distance of the inlet and outlet, and by required volume and velocity.
Industry:Mining
A drawing or log giving details of the structure and the nature of strata intersected by a shaft.
Industry:Mining
A dredge containing a suction head that is pulled over the underwater ground much as a dustpan would be. About 8 in (20 cm) high, the dustpan may be from 20 to 40 ft (3.6 to 7.1 m) long and is supplied with jets along its face to stir up the bottom surface.
Industry:Mining
A dredge having two pontoons, between which passes a chain of digging buckets. These buckets excavate material at the bottom of the pond (paddock) in which the dredge floats, and deposit it in concentrating devices on the decks.
Industry:Mining
A dredge in which rotary blades dislodge the material to be excavated, which is then removed by suction, as in a sand-pump dredger.
Industry:Mining
A dredge in which the gravel goes from the trommel to a classifier and then to jigs.
Industry:Mining
