Accurate control method for surrounding rock of coal mine tunnel crossing fault area

The invention discloses an accurate control method for surrounding rock of a coal mine tunnel crossing fault area, which comprises the following steps of: (1) carrying out ground stress inversion on afault damage area to determine a ground stress distribution rule of the tunnel crossing fault area; (2) taking mudstone of the surrounding rock fault zone of the roadway, carrying out a remolding test, and determining the physical and mechanical properties of the surrounding rock by adopting a geological strength index (GSI) method; (3) adopting a discrete element simulation method to preferablyselect a fault zone surrounding rock control scheme, and determining a precise surrounding rock control method for a fracture zone of the coal mine tunnel crossing fault ; and (4) observing the mine pressure of the roadway surrounding rock. Aiming at the characteristics of quick rock stratum lithology change and rock stratum crushing of a fault fracture zone, the stress distribution rule and the surrounding rock type of th