Plasma blasting method

Details Plasma blasting method Plasma blasting method

1991-02-26

1992-04-21

Bagnell, David J.

Mining or in situ disintegration of hard material

Processes

Directly applying heat or vibration

166 63, 175 16, E21C 3718

Patent

active

051061643

ABSTRACT:
A blasting method which comprises delivering electrical energy at a rate of at least 100 megawatts per microsecond until a peak power of at least 3 gigawatts is reached across the gap of two poles of a coaxial electrode assembly immersed in an electrolyte within a confined area of a substance to be blasted. A dielectric break-down of the electrolyte in the confined area is produced resulting in the formation of plasma within the confined area which creates a pressure sufficient to blast the substance in the manner of a high explosive charge.

REFERENCES:
patent: 3158207 (1964-11-01), Rowley
patent: 3208647 (1965-09-01), Bailey
patent: 3283294 (1966-11-01), Schrom
patent: 3364708 (1968-01-01), Padberg, Jr.
patent: 3500942 (1970-03-01), Smith, Jr.
patent: 3583766 (1971-06-01), Padberg, Jr.
patent: 3679007 (1972-07-01), O'Hare
patent: 4897577 (1990-01-01), Kitzinger
"The Electrohydraulic Crusher", Feb. 1961, pp. 134-140, Engineering and Mining Journal.
"Electrohydraulic Effect--a New Energy Source for Rock Fragmentation?", Feb. 1970, pp. 88-89, Engineering and Mining Journal.
Novel comminution Process Uses Electric and Ultrasonic Energy, Parekh, et al., Sep. 1984, pp. 1305-1309.
The Electrohydraulic Effect: Potential Application In Rock Fragmentation, Kutter, 1969, pp. 1-35.

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