Abstract:In order to solve the theoretical computation problem of parameters on wave front of air shock wave when propagating along sudden swerving tunnel system, the relation equations of air shock wave, which can consider propagation impedance exerted by sudden swerving tunnels, are used to construct the theoretical computation method that calculates the parameters on wave front of air shock wave when it propagates along sudden swerving tunnel system, the formulas give consideration of extra propagation impedance when air shock wave along sudden swerving tunnel system which possesses of many suddenly-changed sections, can accurately calculate such parameters of wave front as propagation speed of wave front, air velocity, air density, speed of sound, temperature, overpressure behind wave front when tunnel system has great extents and varying sections. It provides a theoretical basis for controlling the harm from air shock wave propagating among underground tunnel system.