电能点火法—就是通过小号金属丝（以下简称“桥丝”）的电热效应，对导火索进行加热、点燃的起爆方法。近年来，这种方法在我队进行了反复的试验和井下爆破作业的应用。取得了良好的效果。据我们统计，仅31~#竖井使用此法点炮共计122次，点炮数合计721个，累计产生瞎炮42个，成功率达94％以上。尽管它不能实现同步起爆和微差起爆，但在当前井巷掘进爆破作业中（尤其是垂直巷道），仍是一种较为 Energy ignition method - that is, through the small wire (hereinafter referred to as “bridge wire”) of the heating effect, the fuse is heated, ignited initiation method. In recent years, this method has been used in our team for repeated tests and downhole blasting operations. got a good result. According to our statistics, only 31 ~ # silos used this method for a total of 122 cannon points, with a total of 721 point gun numbers, generating a total of 42 blind guns with a success rate of 94% or more. Although it can not achieve simultaneous detonation and differential detonation, it is still a relatively common problem in current tunneling and blasting operations (especially in vertical tunnels)