Tunnel grouting method based on numerical simulation fault fracture zone

The invention discloses a numerical simulation-based fault fracture zone tunnel grouting method. The method comprises the following steps: acquiring geological data of a tunnel construction section; based on an advanced geological prediction method, predicting the geological condition in front of the tunnel face of the tunnel construction section to obtain a prediction result of the geological condition in front of the tunnel face; inputting the geological data and the prediction result of the geological condition in front of the tunnel face into a pre-trained three-dimensional numerical model of the fault fracture zone to obtain a prediction result of the fault fracture zone; based on the fault fracture zone prediction result, a tunnel construction grouting scheme is determined; and tunnel construction section grouting is completed based on the tunnel construction grouting scheme. By performing accurate fault fracture zone prediction on the tunnel, geological conditions and problems possibly encountered in c