Abstract: Design of coal pillar are important factors in the prevention and treatment of percussive ground pressure. But as a result of ventilation, fire prevention and historical reasons, some mines mined with wide pillar. In mine roadway excavation in the process of dynamic appeared frequently, a serious threat to the safety production. In this paper, Cui Mu coal mine 21306 working face of engineering objects. Determined by numerical simulation and field microseismic monitoring, impact bias, syncline structure, coal strata along the empty coal pillar is the main influence factors of percussive ground pressure of 21306 roadway. In the excavation process has adopted advanced pressure relief, two sides and bottom pressure relief measures. Pre-splitting blasting in the drainage areas has been done besides the roof. Through the above measures, lane 21306 machine in the process of excavation, significantly reduce the dynamic phenomenon, roadway, to not impact accidents, ensure the safety of along goaf roadway.