Abstract:In order to study the law of explosion shock wave propagation in confined space, an exposed charge explosion field test was conducted on the No.1 shaft cross channel of Shandong Lunan Station of Qingdao Metro Line 8. The explosive shock wave parameters of No.2 rock emulsion explosive (0.2 kg, 0.3 kg and 0.4 kg) were collected by using NUBOX-9100 transient signal measuring instrument and equipped sensors, and the waveform and overpressure peak of the measured shock wave signal were analyzed, and the short-time Fourier transform of the shock wave signal was performed. The results show that, ①When the exposed charge explodes in the cross channel, the pressure at each observation point rises rapidly to the maximum value, followed by oscillation attenuation. ②The shock wave peak pressure correction formula is fitted from the measured data, and the error with the measured data does not exceed 12.58%, which can accurately predict the peak overpressure of shock wave. ③The short-time Fourier transform results show that the main frequency of the shock wave signal in the cross channel is low frequency, and the energy shows a downward trend with the increase of frequency. Analyzing the characteristics of the measured shock wave data through the explosion test of the shaft cross channel, it is of reference significance for studying the propagation law of explosion shock wave in confined space.