Experimental Investigation of Door-Explosion with Short-Delay Controlled Blasting in the Counterterrorism

The counterterrorism personnel commonly use the methods of the concentrated charge and multi-spot explosion to open fast track, rescue the hostage and capture the terrorists. The peak overpressures of the blast wave produced by above two methods are very high, which may easily cause unnecessary damage to the counterterrorism personnel. A new multi-spot short-delay controlled blasting technique is proposed in this paper. The experimental results show that the expansion bolts could be considered as the weakness of the burglarproof door in the door-explosion, and the peak overpressure of shock wave is effectively reduced by this new method. Moreover, the best dosage and safe distance in the blasting are obtained.