The west ventilation roadway in Damoling Coal Mine in China suffered the serious impact of tectonic stress. The deformation of the roadway was observed and the asymmetric deformation behavior was analyzed. FLAC3D was used to simulate the distribution of the stress, displacement and plastic zone with the original support. The drawbacks of the original support scheme were deficient support resistance, no effect on the asymmetric deformation and no support effect on the floor. The improved support scheme named "symmetric integrated support technology using long anchors and anchor cables" was proposed. The new support suggested increasing the length of anchors, optimizing the interval of anchors, and installing anchors in the floor. The simulation results of FLAC3D verify the improved support scheme. The deformation data of the roadway after conducting the improved support scheme was obtained. The deformation value showed a remarkable decrease and the asymmetric deformation characteristic was improved obviously. The successful application of the supporting technology provides a reference for roadways with similar geological conditions