Non-entry mining method equipment

Details Non-entry mining method equipment Non-entry mining method equipment

1995-02-14

1996-03-12

Bagnell, David J.

Mining or in situ disintegration of hard material

Processes

Breaking down by direct contact with fluid

175 67, 299 56, 299 813, F21C 2560, F21C 4500

Patent

active

054980682

ABSTRACT:
A jet boring pre-assembly for excavating an underground area susceptible to disaggregation and for control from a working gallery below the area includes a cutting head for the top of the assembly, the cutting head having separate conduits for delivery of high pressure cutting fluid to high pressure nozzles, and a low pressure flushing fluid to flushing nozzles. A dual conduit drilling rod is located in a borehole beneath the cutting head, the rod having separate conduits for delivery of the high pressure and low pressure fluids to the cutting head. A preventor box below the cutting head seals the borehole and transmits slurry of excavated material to an outlet.

REFERENCES:
patent: 1935643 (1933-11-01), Laughlin
patent: 4921306 (1990-01-01), Tomlin
patent: 5255959 (1993-10-01), Loegel

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