Explosive blasting method and means

Details Explosive blasting method and means Explosive blasting method and means

1980-12-22

1983-05-10

Nelson, Peter A.

Ammunition and explosives

Blasting

Detonation wave modifying

102312, 102313, 102320, 102321, F42B 102

Patent

active

043824102

ABSTRACT:
An explosive blasting method and apparatus for producing rock fragmentation and substantially reducing the amplitude of seismic effects (ground vibration) in the vicinity of the blast. An embodiment of the invention utilizes an air gap method and apparatus for superheating the air surrounding the charge in a borehole thereby significantly raising the pressure therein coupled with the use of multiple detonation points along the borehole for the reduction of burn time thereby substantially reducing the quantity of explosives used along with a marked reduction of seismic shock, sound and dust effects to the surrounding area.

REFERENCES:
patent: 2903969 (1959-09-01), Kolbe
patent: 3687075 (1972-08-01), Fritz
patent: 3780654 (1973-12-01), Shimizu et al.
patent: 3952655 (1976-04-01), Kusakabe et al.
patent: 4074629 (1978-02-01), Colgate
patent: 4175490 (1979-11-01), Britton et al.
patent: 4191265 (1980-03-01), Bosse-Platiere
patent: 4248303 (1981-02-01), Charpentier

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