In order to explore the large deformation mechanism and control method of deep soft roadway

analysis is made based on the engineering background of level -885 m east wing rail roadway of Zhuji Coal Mine

Huainan mining area. This roadway is a typical deep soft rock of high geostress

of which the surrounding rock becomes extremely unstable

showing strong nonlinear deformation characteristics and high deformation rate after excavation. Rating of the large deformation is firstly made. The surrounding rock stress field and displacement field are analyzed by Hoek-Brown elastoplastic constitutive model. Considering the strength of surrounding rock

the influences of disturbance

the cross-section shape

the roadway deformation mechanism are revealed finally. Optimized supporting method is proposed which is paid great attention to the floor supporting and bottom shearing support. Numerical simulation and field monitoring show that the new method obtained good effect and it’s a kind of effective method to controlling large deformation of surrounding rocks of deep roadway.