Blasting agent and method

Details Blasting agent and method Blasting agent and method

1976-09-24

1978-02-21

Pendegrass, Verlin R.

Ammunition and explosives

Igniting devices and systems

F42D 100

Patent

active

040746291

ABSTRACT:
A blasting method uses liquid oxygen and a fluid fuel selected from the cryogenic fuels (liquefied methane, ethane and propane), acetylene and carbonaceous materials (such as fuel oil and powdered coal). A shock force is imposed on the blasting agent to initiate detonation or fluid-fluid explosive self-mixing or both detonation and explosive self-mixing of the fuel and LOX (depending on the fuel). The LOX and the cryogenic fuels (when used) are conducted from safely remote sources through cryogenic fill lines into cryogenic containers in the blast holes, which keep the cryogenic fluids out of thermal contact with the ambient temperature materials in and around the blast hole. The containers and at least the parts of the fill lines near enough to the hole to be damaged or destroyed by the blast are made from closed cell plastic foam, a readily available, cheap, disposable material.

REFERENCES:
patent: 2886424 (1959-05-01), Hyslop, Jr.
patent: 2920523 (1960-01-01), Barco et al.
patent: 3035519 (1962-05-01), Barlow
patent: 3482515 (1969-12-01), St. Clair
patent: 3768411 (1973-10-01), Maes

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