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运用火药爆破溢洪道口门上的土堤以蓄滞河道洪水,挽救危局,都是在紧急情况下进行的。因此必须根据水情缜密推算爆破时间并事先考虑在爆破时所需的时间
The use of gunpowicides to burst the earthworks on the spillways’ entrances to flood the river and save the dangerous situation were carried out in emergency situations. Therefore, it is necessary to calculate the blasting time according to the water conditions and to consider in advance the time required for blasting