Method and apparatus for boring and shearing of rocks

Details Method and apparatus for boring and shearing of rocks Method and apparatus for boring and shearing of rocks

1996-09-06

1998-11-17

Bagnell, David J.

Mining or in situ disintegration of hard material

Hard material disintegrating machines

Rotary cutter head with advance direction coincident or...

299 801, 299 75, E21C 2718

Patent

active

058366580

ABSTRACT:
A method of rock cutting where, as a first step of each excavation cycle, a second open surface is created utilizing boring method and, as a second step, the excavation cycle is completed utilizing a shearing method; and a cutting element for excavation of rocks comprising both a boring tool and a shearing tool, wherein the cutting element can be remotely adapted either for boring or for shearing.

REFERENCES:
patent: 2920879 (1960-01-01), Driehaus
patent: 3306663 (1967-02-01), Webster
patent: 4159149 (1979-06-01), Castanoli et al.
patent: 4596424 (1986-06-01), Wilcox, Jr. et al.
patent: 4749194 (1988-06-01), Schmid
patent: 4848844 (1989-07-01), Weiss

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