Abstract：With the further deep mining and the complexity of the geological and mechanical conditions of roadway become more complicated compared with those in shallow roadway. Due to the special rock strata structure and the engineering geological conditions of high geostress，high geothermal temperature，high risk of water inrush as well as the disturbance of mining activity(three-high and one-disturbance action)，roadways at great depth have the complex mechanical behaviors both in deformability and stress distribution. Consequently，the nonlinear mechanical phenomena occur with high frequency，which bring about great difficulties for deep engineering support during excavation and mining. Because of structure stress effect，high content of clay mineral and influence of the goaf on the top，it had taken on asymmetric deformation characteristic in Haulage Tunnel(level －785 m underground) at Kongzhuang Coal Mine. Based on the in-situ investigation，experimental test，analysis of engineering geological conditions，geomechanical evaluation and numerical simulation，the displacement distribution and stress distribution of the surrounding rock mass in Haulage Tunnel(level －785 m underground) at Kongzhuang Coal Mine are considered. The numerical results indicate that centralized pressure on the upper goaf may be the main reason for asymmetric deformation in Haulage Tunnel(level －785 m underground) at Kongzhuang Coal Mine；and clay mineral swelling when interaction with water and in-situ stress will further deteriorate of the roadway rock structure. It provided a preparatory basis for decision-making of asymmetric deformation in Haulage Tunnel(level －785 m underground) at Kongzhuang Coal Mine. The result of in-situ test shows that the design can ultimately guarantee the stability of deep coal gateway，and the success supporting effect can be obtained.
