Method for dredging rock with a pick and water jet combination

Details Method for dredging rock with a pick and water jet combination Method for dredging rock with a pick and water jet combination

1984-05-01

1985-01-01

Crowder, Clifford D.

Mining or in situ disintegration of hard material

Processes

Breaking down by direct contact with fluid

37 78, E21C 2560

Patent

active

044913680

ABSTRACT:
A method for breaking out rock from a rock bottom under water, in which a cutting means having at least one pick is moved through the rock bottom. During the cutting procedure at least one water jet is directed from a nozzle towards the disintegrating zone in front of the pick rake surface and the starting energy of the jet is selected relative to the distance to be traversed through the water and relative to the nozzle diameter to such an extent that a cavitation cone forms around the water jet which continues up to the point where the jet hits the rock bottom.

REFERENCES:
patent: 2678203 (1954-05-01), Huff
patent: 3402487 (1968-09-01), Vaughan et al.
patent: 4004358 (1977-01-01), Van Os
patent: 4193635 (1980-03-01), Thiruvengadam et al.
patent: 4254995 (1981-03-01), Guse et al.
patent: 4265487 (1981-05-01), Barker
patent: 4280735 (1981-07-01), Lobbe

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