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[[Category:Explosions]] |
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[[Category:Explosives engineering]] |
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Asympathetic detonation is an unintended detonation of an explosive charge by a nearby explosion.
Ifdetonators with primary explosives are used, the shock wave of the initiating blast may set off the detonator and the attached charge. However even relatively insensitive explosives can be set off if their shock sensitivity is sufficient. Depending on the location, the shock wave can be transported by air, ground, or water.
To prevent sympathetic detonations, minimal distances (specific for a given typ of the mine) have to be maintained between mines when laying a minefield.
Inrock blasting, sympathetic detonations occur when the blastholes are sufficiently close to each other, usually 57 mm or less, and especially in rocks that poorly attenuate the shock energy. Ground water in open channels facilitates sympathetic detonation as well. Blasthole spacing of 300 or more millimeters is suggested. However, in some ditch blasting cases sympathetic detonations are exploited purposefully. A sympathetic detonation between charged blastholes or of charges under separate delays is also called flash over.[1]
