Process and apparatus for fragmenting rock and like material usi

Details Process and apparatus for fragmenting rock and like material usi Process and apparatus for fragmenting rock and like material usi

1985-12-27

1987-06-02

Novosad, Stephen J.

Mining or in situ disintegration of hard material

Processes

Breaking down by direct contact with fluid

299 20, 102313, 102328, E21C 3712

Patent

active

046697837

ABSTRACT:
A technique for fragmenting rock or other relatively hard and/or compact material without the use of explosives is disclosed herein. In accordance with this technique, an elongated, blind opening is provided in the rock or other material to be fragmented and a pulse of water having a relatively high peak pressure and a relatively rapid rise time is directed into the elongated opening without the use of explosives to produce the pulse, whereby to produce a shock wave in the rock or other material sufficient to fragment it. In an actual embodiment, this explosion free pulse of water has a peak pressure of about 80,000 psi and a rise time of about one millisecond.

REFERENCES:
patent: 1569226 (1926-01-01), Hemholtz et al.
patent: 2024247 (1935-12-01), Officer
patent: 2058099 (1936-10-01), Osgood
patent: 2083706 (1937-06-01), Harris
patent: 3202108 (1965-08-01), Fly et al.
patent: 3302720 (1967-02-01), Brandon
patent: 4195885 (1980-04-01), Lavon
patent: 4474409 (1984-10-01), Trevits et al.

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