Abstract:Tunnel excavation encounters a variety of geological challenges, such as faults, caves, etc. Currently tunnel seismic prediction adopts TSP, which is used widely, but research about TSP is currently focused on its engineering application examples. In this paper, we use the finite element method to simulate the tunnel seismic wave field, employing wave field snapshots and combined time recording methods to study the impact of caves on the characteristics of the propagation of seismic wave field tunnel. We also employ inversion processing of the time record of the model containing the cave. We compare our method with the velocity scattered image and reflection interface position, velocity processing with the default values set by using TSPwin. The results are good for tunnel seismic velocity cave layered model with single prediction, and have a higher prediction accuracy of the P-wave. Finally, we process and analyze engineering examples to verify the numerical simulation the conclusions.