Method and means for cavity mining minerals from a...

Details Method and means for cavity mining minerals from a... Method and means for cavity mining minerals from a...

E - Fixed Constructions

21

C

262/68

E21C 25/60 (2006.01) E21B 7/18 (2006.01) E21B 43/28 (2006.01) E21B 43/29 (2006.01) F04F 5/10 (2006.01)

Patent

CA 1059539

A B S T R A C T Minerals such as coal are recovered from an underground deposit by hydraulically jetting an under- ground cavity by means of a hydraulic jet nozzle that is lowered to the desired depth through a borehole. The particles that are broken from the underground deposit are transported through the borehole to the surface by means of a hydraulic jet pump. Oversized particles that cannot enter the pump inlet are crushed to prevent clogging of the entrance.

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