Abstract: Rockburst was frequently occurred in the process of Wu Dong coal mine Southern mining horizontal section mining in steep inclined thick coal seam . Seismic CT detection showed that, the complicated structure of the overlying coal pillar is the main cause of stress concentration and even impact. For this reason, the two kinds of rockburst prevention measures were adopted in this area, such as coal injection and coal body pressure relief blasting, and the control effect was evaluated by using seismic CT detection. The evaluation results show that the coal water injection and pressure relief blasting can effectively reduce the stress concentration in the coal body, reduce the impact risk, and ensure the normal safe mining of the working face.