Tunnel surrounding rock grading method and device, computer equipment and storage medium

The invention relates to the technical field of engineering investigation, and discloses a tunnel surrounding rock grading method and device, computer equipment and a storage medium, and the tunnel surrounding rock grading method comprises the steps: building a complete rock model according to the target surrounding rock information of a target tunnel; analyzing a plurality of drill holes of the complete rock model to obtain geometric parameters of a plurality of fractures in the target surrounding rock information; establishing a discrete fracture network model according to the geometric parameters of the multiple fractures; establishing a comprehensive rock mass model according to the complete rock model and the discrete fracture network model; determining rock mass strength data and elastic modulus data of the target surrounding rock information according to the comprehensive rock mass model; according to the rock mass strength data and the elastic modulus data, basic quality indexes of the target rock mas