Regional Prevention Techniques of Rock-burst of Deep Buried and Complex Coalface

Based on the background of 7433 coalface in Kongzhuang Coal Mine, the parameters of coalface are optimized, which mainly includes the optimization of open-off cut position and coal pillar, with comparison analysis of the vertical stress on the side of ventilation roadway before and after optimization, which indicates that stress concentration at the beginning of stoping is decreased and better effect of rock-burst prevention is gained after optimizing the parameters. The conclusion of this paper provides the basis of rock-burst prevention to other coalfaces in Kongzhuang Coal Mine, Datun Mining Area and other coal mines which are under the deep buried and complex geological conditions.