针对千米深井沿空留巷存在的问题,以山东某矿为试验场所,开展了沿空巷旁复合材料充填试验及其应用的研究。通过对沿空留巷覆岩结构模型和岩层运动的分析,认为留巷围岩结构要经历4个主要动压阶段:巷旁围岩破碎圈扩大阶段、不对称结构形成阶段、蠕变与稳定阶段以及二次回采超前影响阶段;根据岩层运动及矿压理论建立了巷旁充填体最大压缩量和矸石砖的最小抗压强度计算模型,得出充填体最大压缩量和最小强度分别为0.3 m和6 MPa;基于此提出了基于复合充填材料的分段分级施工、承载理论,并进行了主副墙体的参数和性能设计;最后,研究了主墙体矸石砖的制作过程,包括配比的优化、生产的工艺流程等参数。该矿工程实践表明,沿空巷旁复合材料(主副墙体)充填技术能够适应顶板岩层的运动规律,发挥了主副墙体的各自功能,满足支撑顶板、维护巷道稳定等需求,达到了预期效果。 Aiming at the existing problems of gob-side entry retaining in 1000m deep mine, a mine in Shandong was used as a test site to carry out research on composite material filling test and its application along gob-side entry. Based on the analysis of the overburden strata structure model and rock movement, it is considered that the surrounding rock structure of the laneway has to go through four main stages of dynamic pressure: the expanding stage of the surrounding rock crushing circle, phase of formation of asymmetric structure, creep and stability Stage and the secondary impact of advanced mining stage; according to the rock movement and pressure theory to establish the maximum compression of the roadside filling body and the minimum compressive strength of gangue brick calculated model, the maximum compression and minimum strength of the filling body were 0.3 m And 6 MPa. Based on this, the sectional construction and loading theory based on composite filling material was put forward, and the parameters and performance design of the main wall and the main wall were proposed. Finally, Optimization, production process and other parameters. The mine engineering practice shows that the filling technology of composite materials (main and auxiliary walls) beside the roadway can adapt to the movement law of the roof strata, exert the respective functions of the main wall and the auxiliary wall, meet the requirements of supporting the roof and maintaining the stability of the roadway, expected result.