Abstract:In order to study the dynamic response law of roadway surrounding rock under downhole blasting dynamic load, the vibration test data are processed by MATLAB, and the derived vibration velocity, displacement, absolute acceleration response spectrum and absolute acceleration standard response spectrum were studied in depth. The research results show that: The peak number of velocity response spectra with a detonation distance of 185 m appears in the period of 2 s more than the peak number of velocity response spectra with a detonation distance of 86 m. The harmonic component below 10 Hz with a detonation distance of 185 m is higher than that with a detonation distance of 86 m. The blasting effect has a greater impact on the damage of surrounding rocks at blast center distance of 185 m. When the blasting distance is 185m and the damping ratio is 0.05, the amplification factor is 1, which is easy to cause damage to the surrounding rock. This has guiding significance for the surrounding rock support.