Method of placing blasting charges in wet boreholes

Details Method of placing blasting charges in wet boreholes Method of placing blasting charges in wet boreholes

1976-04-15

1977-10-25

Miller, Edward A.

Ammunition and explosives

Igniting devices and systems

102 24R, 299 13, F42D 100

Patent

active

040551229

ABSTRACT:
In the quarrying of wet, poorly consolidated rock in which blasting charges are placed with the aid of a removable metal casing to prevent collapse of the walls of the boreholes, improved results are obtained by placing cardboard tubing inside the removable metal casing with internal bushings reinforcing the tubing joints instead of using external collars or connectors.

REFERENCES:
patent: 2383542 (1945-08-01), Godfrey
patent: 3195928 (1965-07-01), Pasternack
patent: 3276371 (1966-10-01), Newman et al.
patent: 3971318 (1976-07-01), Burkle et al.

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