Method for driving a shaft with shaped charges

Details Method for driving a shaft with shaped charges Method for driving a shaft with shaped charges

1976-03-01

1978-01-24

Brown, David H.

Ammunition and explosives

Igniting devices and systems

102 24HC, 175 46, 175 53, F42D 102, F42D 304

Patent

active

040697606

ABSTRACT:
A method of driving a shaft, or tunnel into competent hard rock with shaped charges. An array of shaped charges to nearly conform with the bottom of the shaft, or face of the tunnel, is carried upon a framework which places the charges a proper distance from the bottom or face surface. Detonation causes the shaped charge jets to penetrate and break several feet into the rock to advance the shaft or tunnel. The loose rock may then be mucked out of the shaft, or tunnel, and the operation repeated. A shaft may be driven downwardly or upwardly by these operations.

REFERENCES:
patent: 1502030 (1924-07-01), Goodney
patent: 2823900 (1958-02-01), Kandle
patent: 2897756 (1959-08-01), Borins et al.
patent: 3348482 (1967-10-01), Keener et al.
patent: 3441096 (1969-04-01), Lautsch
patent: 3486572 (1969-12-01), Hamilton et al.
patent: 3659660 (1972-05-01), Conn
patent: 3695715 (1972-10-01), Godfrey
patent: 3741119 (1973-06-01), Eckels
patent: 3905430 (1975-09-01), Poundstone
patent: 3972285 (1976-08-01), Brown
patent: 3975056 (1976-08-01), Peterson

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