Underwater blasting explosives

Details Underwater blasting explosives Underwater blasting explosives

1975-12-11

1977-09-13

Engle, Samuel W.

Explosive and thermic compositions or charges

Metal or alloy or metalloid, each in particulate form, with...

149 39, 149 75, 149105, 260 965C, C06B 3300, C06B 3310, C06B 2900, C07B 2100

Patent

active

040479870

ABSTRACT:
This invention relates to a method of removing underwater obstacles by bling with a fluid explosure, a device for monitoring the execution of the method from a remote place, a fluid explosive composition especially suitable for the practice of the method, and a detonating device which is very suitable for detonating the fluid explosive. This underwater blasting method comprises the steps of injecting into a blasting hole drilled on an underwater obstacle an inert fluid which is immiscible with water and has a specific gravity greater than water, then injecting a fluid explosive having a specific gravity greater than the inert fluid to replace therewith a part of the inert fluid and thereafter detonating the injected explosive.
The monitoring device is provided with a means for electrically detecting the level of the fluid explosive injected into the blasting hole. The fluid explosive composition contains as the explosive ingredient urea perchlorate. The detonating device is a float provided with a detonator which can act upon the fluid explosive from a remote place.

REFERENCES:
patent: 2155717 (1939-04-01), Kunnle
patent: 2279765 (1942-04-01), Spaeth
patent: 2929699 (1960-03-01), Audrieth
patent: 2980505 (1961-04-01), Haas
patent: 3141039 (1964-07-01), Weichman
patent: 3265730 (1966-08-01), Heubusch
patent: 3411962 (1968-11-01), Chaille
patent: 3457127 (1969-07-01), Cook
patent: 3660455 (1972-05-01), Hoffman
patent: 3695947 (1972-10-01), Edwards
patent: 3904602 (1975-09-01), Somlo

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