The approximate vertical reflection method is a seismic exploration technique with a minimum offset,which does not need a sufficiently large offset and is suitable for tunnel,roadway and other underground projects with narrow space.It can be used to locate and track medium and large geological structures such as faults and corrosion zones.Firstly,combined with the actual engineering situation,the tunnel and fault model are modeled,and the model parameters which are in accordance with the actual engineering are given.The forward simulation research is carried out,and the theoretical detection results of the fault are obtained.Then,approximate vertical reflection method detection is carried out three times in practical engineering by using forward simulation of seismic array parameters,and the results of forward simulation are compared and analyzed.Finally,the validity of approximate vertical reflection method in fault detection is proved by the actual excavation of tunnel.
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