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针对综放沿空留巷特点和技术难点,运用采动岩体关键层理论建立了综放沿空留巷围岩的结构力学模型,为综放大断面沿空留巷技术整体合理设计奠定理论基础;以大断面全煤巷道高强锚杆支护技术为基础,将传统的在巷旁采空区实施的巷旁充填工艺,变革为在巷道内采空区侧实施的巷内充填工艺,这样既保证了顶煤的完整性与煤帮的稳定性,又保证了充填工艺系统更安全和易操作;同时,为更有效地控制长距离充填体的整体稳定性,对充填体实施了空间锚栓加固,大幅度提高了充填体的强度和抗变形能力。
Aiming at the characteristics and technical difficulties of gob-side entry retaining in fully mechanized caving face, the structural mechanics model of surrounding rock of gob-side entry retaining in fully mechanized top coal caving has been established by using key layer theory of mining rock mass, laying a theoretical foundation for overall reasonable design of gob-side entry retaining technology in fully mechanized caving face ; Based on the high-strength rock bolt support technology for large-section full coal roadway, the traditional roadside filling process carried out in the roadside gob area is transformed into the lane filling process carried out in the gob side of the roadway so that both To ensure the integrity of top coal and the stability of coal gang, but also to ensure that the filling process system safer and easier to operate; the same time, in order to more effectively control the overall stability of the long-distance filling body, the filling body implemented space anchor Reinforced, a substantial increase in the strength of the filling body and deformation resistance.