In order to solve the problems of short circuit and half explosion of industrial electronic detonators in water-bearing blast hole,the immersion test was conducted on electronic detonators by using a high-pressure water tank.At the same time,the influence of crimping status,crimping size,and detonator shell thickness on the waterproof performance of electronic detonators was explored.The study found that the crimping wrinkle is the main reason for water ingress in electronic detonators,which can lead to short circuit and half explosion.By optimizing the diameter at the petal shape of the crimped head in automated production line,the crimping wrinkles have been eliminated.The optimized electronic detonator products have good waterproof performance,meeting the requirements of 50 meters and 72 hours for water resistance.And by use of an iron tube shell with a thickness of 0.40 millimeters and a crimping size of 5.60 millimeters,the stability of the crimping operation could be improved.At the same time,it reduces the safety hazards of manually removing defective products,which helps to realize the safe production mode of unmanned factory.
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