Method for determining advanced grouting reinforcement opportunity of tunnel fault fracture zone

The invention discloses a method for determining the advance grouting reinforcement opportunity of a tunnel fault fracture zone. The technical problem that the advance grouting reinforcement opportunity cannot be accurately and efficiently determined in the prior art is solved. The determination method comprises the following steps: Step 100: drawing a tunnel excavation model in finite element software; step 200: then inputting the surrounding rock data, the primary support data and the fault fracture zone data into the tunnel excavation model; 300, excavation simulation is conducted on the tunnel excavation model according to the field excavation construction scheme; step400, in the excavation simulation process, recording tunneling distance data and tunnel face protrusion amount data generated along with the change of the tunneling distance; step 500, after excavation simulation is finished, drawing a curve graph of the protruding amount of the tunnel face along with the change of the tunneling distance; an