Study on Failure Law of Deformation and Instability of Surrounding Rock in Deep Soft Rock Roadway

Aiming at the problem of large deformation and soft fracture of soft rock in deep roadway, through theoretical analysis of deformation and failure characteristics of surrounding rock of deep roadway, the space-time evolution law of deformation and failure of surrounding rock of deep soft rock roadway is obtained by FLAC3D software simulation. The results show that: The deformation of surrounding rock in deep soft rock roadway is characterized by roof subsidence, two sides moving inward and floor bulging. Under the action of high stress, the deformation of surrounding rock of soft rock roadway has a certain timeliness. The deformation and failure of surrounding rock of roadway is a changing process with time. The damage degree of roof, floor and two sides of roadway increases with time, and finally tends to a stable state. The deformation presents a distribution law that the de-formation of floor is larger than that of roof and convergence of two sides.