Failure mechanism and stability control of surrounding rock in mining roadway with gentle slope and close distance

•A reliable numerical model In this paper, according to the field measured data and rock mechanics experiments, the quantitative specific parameters of goaf filling zone are deduced by limit equilibrium theory, and then the double yield constitutive model (Double-yield) is used to obtain the mechanical parameters of double yield model of filling compaction area and complete filling area. through numerical simulation test, a real and reliable numerical calculation model is obtained.•A novel characteristic research topic In this paper, in view of the severe mine pressure behavior of the roadway in the gently inclined short-distance coal seam, the serious failure of the support body and the major practical problems that often occur in the roof fall accident, the failure and instability mechanism of mining roadway in gently inclined short-distance coal seam is studied, and the surrounding rock control scheme of roadway is put forward and verified. The mechanical mechanism and development law of non-uniform expansion of plastic area when the magnitude and direction of superimposed stress field of roadway surrounding rock change with mining activities are obtained, which provides a theoretical basis and a new technical way for the stability control of surrounding rock of mining roadway.•Scientific research program In this paper, three roadway stages are distinguished according to the stress field environment and roof conditions, taking the superimposed stress field and failure space evolution law of roadway surrounding rock in each stage as the main line, and based on the theory of “roadway butterfly failure”. The mechanical mechanism of the formation of plastic zone when the magnitude and direction of superimposed stress field of roadway surrounding rock changes with mining activity is obtained, and a stage-by-stage cooperative stability control method of roadway surrounding rock is put forward.•Detailed verification of surrounding rock control effect In this paper, the proposed surrounding rock control scheme is verified by numerical simulation and industrial test. The control effect of the transition stage of the transport roadway under the use of three support schemes is compared and analyzed by numerical simulation, and the stress of the bolt cable in the advance support area of the roadway and the convergence and deformation of the roadway surface are verified by industrial test. The results show that the control effect of roadway surrounding rock is good