Experimental Study on Shock Wave Effects of Thermo-baric Explosive in Complex Tunnel

The curves of shock wave peak overpressure, shock wave impulse and response peak temperature for thermo-baric and TNT explosives in complex tunnel were obtained by blast experiments respectively. The propagation rules of explosive shock-wave of thermo-baric explosive in complex tunnel were studied, and the characteristics of blast effect parameters for thermo-baric explosive and TNT were also compared. The results shows that there are several peak values in the curves of shock wave overpressure, but the first peak value is not the maximum one with the increase of the instance from the explosion center. The bended tunnel not only can make the shock wave peak overpressure decreased effectively, but also can make shock wave impulse increased. The shock wave peak overpressure, shock wave impulse and response peak temperature of thermo-baric explosive sample are generally larger than those of TNT, and the secondary combustion process for thermo-baric explosive occurs obviously.