Research on one borehole hydraulic coal mining system ,jul 01, 2008 the ideal jet of the monitor in the borehole hydraulic coal-mining system is a nonsubmergible free jet. through air lift, the nonsubmergible free jet can be set up in the mining hole. references dibble borehole mining: improved technology expands horizon. mining engineering, 1991, 290:free consultaion
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jul 01, 2008 the ideal jet of the monitor in the borehole hydraulic coal-mining system is a nonsubmergible free jet. through air lift, the nonsubmergible free jet can be set up in the mining hole. references dibble borehole mining: improved technology expands horizon. mining engineering, 1991, 290:
machines for underground mining. 2500 3900. methods of hydraulic mining, hydraulic monitors. 4500. machines for surface mining. 4700. mining methods for obtaining peat. 4900. methods of underwater mining. 5000. obtaining minerals through a borehole drilled from the surface. 4328 4329
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the borehole hydraulic coal mining system accesses the coal seam through a hole drilled in the overburden. the mining device is lowered through the hole into the coal seam where it fragments the coal with high-pressure water jets. the fragmented coal is pumped to the surface as a slurry by a jet pump located in the center of the mining device.
articleost, title survey of underground hydraulic coal mining technology. volume ii. appendix data on underground hydraulic coal mines. final report, jun 1974--30 sep 1975, author cooley, abstractnote review is included of all relevant data on underground hydraulic coal mining technology. data from the literature on each hydraulic mine has been
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