关键词: 千米深井, 孤岛工作面, 沿空掘巷, 冲击地压, 支护-卸压协同控制

Abstract: Abstract：Fierce underground press and high rock-burst hazard appear in an island coal face, which especially is more outstanding in km deep mine. Regarding 7121 face of certain mine as field background, the paper explores stress distribution characteristics and rock burst mechanism in roadway driving along next goaf of an island coal face, puts forward support and pressure relief coordination control technique and carries out FLAC2D numerical simulation analysis. The results indicate that the stress distribution is basically a saddle-shaped, stress concentration factor is about 3 and rock-burst is induced by dynamic and static load superposition that the high static loads play a dominant effect while strong dynamic loads play a induced function in an island coal face. 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 is adopted. The peak stress of support and pressure relief coordination scheme is 58.66MPa, two sides convergence deformation is 57.76mm and plastic region is larger on right side, which has the least rock-burst hazard. The field monitoring effect of roadway deformation is significant. The study conclusions provide reference and guidance for preventing coal or rock dynamical disasters in deep mine.