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70年代初,工程兵某部三连曾在一次坑道掘进施工中,造成了一场惨重的伤亡事故。在现场担负爆破任务的三名战士,一名当场牺牲;另一名头部和胸部受重伤,经医院抢救无效死亡;还有一名被炸掉了一只耳朵,胸部和身体的其他部位也多处受重伤,经长时间的抢救,才被从死神手中夺回了年轻的生命。事故发生后,部队有关部门组织一个专门调查组,对事故的现场认真细致地进行了调查和分析。事故发生的那天,三连共打了28个炮孔,每孔装一只即发电雷管和一定数量的硝铵炸药。电爆网路是将炮孔内的电雷管分成若干组作串并联连接,每两只电雷管脚线间采用20号铁丝作为连接线。起爆的电源电压为
In the early 1970s, a company in a certain company of the 3rd company once caused a heavy casualty accident in a pit excavation. One of the three soldiers who took the blasting mission at the scene, one died at the scene; the other was seriously injured on the head and chest and died after being rescued by the hospital; there was also one person who had blown up one ear and had other parts of the chest and body. He was seriously injured. After a long period of rescue, he was recaptured from the hands of the god of death. After the accident, the relevant departments of the armed forces organized a special investigation team to conduct detailed investigation and analysis of the scene of the accident. On the day of the accident, three shots totaled 28 blastholes, each containing a detonator and a certain amount of ammonium nitrate explosives. The electric explosion network divides the electric detonators in the blasthole into several groups for series and parallel connection, and 20-gauge wire is used as the connecting line between each two electric detonator legs. The starting power supply voltage is