Construction and Application of Combination Prediction Model for Tunnel Surrounding Rock Deformation

In the construction of tunnel engineering, the stability of surrounding rock deformation is closely linked with the safety of tunnel engineering. Therefore, to better predict the deformation of tunnel surrounding rock during the construction period, this paper combines the existing gray prediction model and time series model in a nonlinear way, constructs a gray time series combination model, and applies the combination model to the actual tunnel engineering monitoring data to test the effectiveness of its deformation prediction. The results show that the combined model can effectively improve the prediction accuracy compared with a single model, thus realizing better deformation prediction.