Support and Pressure Relief Coordination Control Technique for Rock-burst Roadway in Deep Coal Mine

The paper proposes support and pressure relief coordination control technique based on the rock burst reasons of coal roadway in deep mine, carries out FLAC^2D numerical simulation analysis and engineering practice at 7121 face of a mine. The results indicate that rock-burst is induced by dynamic and static load superposition that the high static loads play a dominant effect while strong dynamic loads play an induced function. The support and pressure relief coordination control technique with the association of inner strong support body of high strength anchor, weak structure body of large-diameter borehole and external strong structure body of primary rock stress can improve the resistance, reduce and prevention capacity of rock-burst. The peak stress of support and pressure relief coordination scheme is 30.24 MPa, the convergence deformation of sides is 45.52 mm and the plastic region is the greatest, which has the least rock-burst hazard. The field monitoring effect of surrounding rock deformation is significant.