Abstract: The stress environment of roadway has an important influence on the pressure relief effect of surrounding rock. In order to explore the pressure relief effect and applicability of pressure relief groove on roadway under different stress environ ments,the applicability of pressure relief technology of roadway surrounding rock under unequal pressure conditions was ana lyzed by theoretical analysis,numerical simulation and field application.The results show that the excavation of the pressure re lief groove will transfer the stress concentration in the shallow part of the surrounding rock to the deep part.The lateral pressure coefficient λ is divided by 1.When λ<1,the maximum shear stress of the roadway is mainly concentrated in the shallow part of the roof and floor.When λ>1,the stress concentration area turns to the deep part of the roof and floor.The larger the lateral pressure coefficient,the better the control effect of the pressure relief groove on the surrounding rock of the roadway,but it is generally more conducive to the stability of the two sides of the roadway.With the increase of the lateral pressure coefficient, the optimization ratio of the two sides of the roadway is gradually reduced in a negative exponential function,and the optimiza tion ratio of the roof and floor is gradually increased.Combined with the analysis of the effect of roadway pressure relief under different stress environments,according to the stress characteristics of the surrounding rock of the mine roadway,targeted con trol measures were proposed and good application results were achieved.

Key words: roadway pressure relief,pressure relief groove,coefficient of lateral pressure,maximum shear stress,sur rounding rock convergence