Damage Assessment of Roadway Wall Caused by Dynamic and Static Load Action of Gas Explosion

In order to obtain the damage characteristics of a roadway wall caused by gas explosion, evaluation theory under dynamic and static loads explosion is analyzed in this paper. Meanwhile, an method (overpressure–impulse criterion) selected evaluate impact load explosion. A mathematical model physical analysis are established LS-DYNA software. The response numerically simulated. overpressure impulse propagation measured, while data different obtained. P-I curves drawn. fitting formula influence geostress (0–20 MPa) on curve analyzed. shape similar conditions. difference mainly shown sizes P0 I0. numerical simulation results show that effect could reflect wall. degree range increase with energy. Under action geostresses, asymptote I0 linear changes. above research provide theoretical basis support for explosions.