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STUDY ON MILLISECOND DETONATOR USED IN COAL MINES

Yao Huifan;Huang Yubin;Sun Caili(No.602 Factory,Kailuan Coal Administration,Hebei 063101)  
A millisecond detonator is introduced in this paper.This detonator,a stantaneous electric detonator,is ignited through the built-in electronic circuit which produces a certain delay and energy pulse current.So the stantaneous detonator can replace millisecond detonator in millisecond blasting in open pits and underground mines.
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