- 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 double conductor cable with one conductor located at the center and with the other conductor strands located concentric to the center conductor with rubber or synthetic insulation between conductors and over the outer conductor.
Industry:Mining
A double conductor cable with one conductor located at the center and with the other conductor strands located concentric to the center conductor with rubber or synthetic insulation between conductors and over the outer conductor.
Industry:Mining
A double furnace for the distillation of zinc wherein waste heat from one set of retorts is utilized for heating the second set.
Industry:Mining
A double kettle, built somewhat like a farina boiler, having two compartments, an outer compartment, which is filled with hot water and which entirely surrounds the inner compartment that contains the dynamite to be thawed. It is provided with a lid for retaining the heat.
Industry:Mining
A double or triple conductor cable with conductors laid side by side without twisting, with rubber or synthetic insulation between conductors and around the whole. The third conductor, when present, is a safety ground wire.
Industry:Mining
A double-ended cutter loader; i.e., it can cut and load in both directions. It consists of four milling heads and one cutter chain surrounding them; guided by armored conveyor; rope-hauled; cuts at 2.3 ft/s (0.7 m/s) and flits at 10 ft/s (3.0 m/s). The minimum workable seam thickness is 26 in (66 cm) on gradients from 0 degrees to 12 degrees ; maximum length of face is 165 yd (151 m); takes 3-1/2 ft (1.07 m) per cut, continuous mining.
Industry:Mining
A double-track loop in a main single-track haulage plane at which mine cars may pass. A loopway located close to the face or loading machine enables a train of empty cars to be stationed in the loop, while the loaded cars are run straight out on the main single track.
Industry:Mining
A double-tube core barrel in which both the outer and inner tubes are rigidly connected to a single headpiece.
Industry:Mining
A double-tube core barrel in which both the outer and inner tubes are rigidly connected to a single headpiece.
Industry:Mining
