Mining method with no delay between shot initiator and firing

Details Mining method with no delay between shot initiator and firing Mining method with no delay between shot initiator and firing

1987-07-01

1988-09-13

Nelson, Peter A.

Ammunition and explosives

Blasting

Patterned blasting

102313, 1022027, 10220213, 299 13, F42D 300

Patent

active

047700971

ABSTRACT:
A method for the electrical sequential initiation of explosions in which a series of detonators (D1-D11) is located in association with a series of explosive charges spaced from one another and in which a shot initiator 12 is used sequentially to initiate firing of the detonators at selected intervals to detonate the explosive charges, characterized in that each detonator is fired without the provision of a delay between the initiation of firing of the detonator at the shot initiator and the actual commencement of firing of the detonator, further characterized in that the interval between the firing of successive detonators is selected from a range of 5 ms to 40 ms.

REFERENCES:
patent: 2891476 (1959-06-01), Forsyth
patent: 3714895 (1973-02-01), Rawson
patent: 3987733 (1976-10-01), Spraggs et al.
patent: 4326752 (1982-04-01), Ricketts
patent: 4350097 (1982-09-01), Bowman et al.
patent: 4406226 (1983-09-01), Davitt et al.

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