Study on effect of obstacles to shock wave of gas explosion

In order to study the effect of obstacles on the propagation law of gas explosion shock wave,the effects of number,size and surface coarse degree of obstacles on the overpressure and propagation law of gas explosion shock wave were tested and analyzed by using horizontal pipeline gas-dust explosion experiment equipment. The results showed that obstacles have an important influence on the propagation law in the process of gas explosion. Obstacles can change the propagation law of explosion shock wave and increase the maximum peak value of the gas explosion shock wave overpressure,and the incentive effect is more obvious with the increasing of the number and size of obstacles. With the increasing of surface coarse degree,the overpressure increases obviously. The results of this study have certain guiding significance on the prevention and control of gas explosion shock wave in underground roadway.