沿空留巷巷旁墙体稳定性多因素影响分析.docVIP

 沿空留巷巷旁墙体稳定性多因素影响分析# 张源源，季明，韩昌良，张鹏冲** （中国矿业大学矿业工程学院，江苏徐州 221008） 5 10 15 20 25 30 摘要：沿空留巷在形成过程中需要经受掘进和两次回采的扰动，维护难度远非常规回采巷道 所能比。巷旁墙体稳定性作为沿空留巷能否成功的关键因素，开展巷旁墙体稳定性影响因素 的分析与研究，可为推广沿空留巷技术提供重要依据。通过总结近些年研究所取得的成果， 结合数值模拟和现场实践经验，重点分析了充填材料力学性能、墙体几何参数、顶板岩层结 构、回采速度等因素对巷旁墙体稳定的影响机理及效果，得出高水速凝材料和膏体材料充填 墙体具有很好的承载特性、不同地质条件下墙体宽度最优值不同以及施工质量等对巷旁墙体 稳定性会产生很大影响等结论，研究结果对于沿空留巷的工业性试验具有一定的借鉴意义。 关键词：沿空留巷；巷旁墙体；高水速凝材料；数值模拟；合理宽度 中图分类号：TD353 Influnce factors on stability of roadside wall of gob-side entry retaining ZHANG Yuanyuan, JI Ming, HAN Changliang, ZHANG Pengchong (School of Mining and Technology,China University of Mining and Technology,Xuzhou Jiangsu 221008) Abstract: The gob-side entry retaining roadway need to suffer the disturbance effect of excavation and two minings, so its difficulty in maintaining is far from conventional roadway. Stability of roadside wall is the key factor to impact the gob-side entry retaining success, developing the analysis and research of influencing factors in stability of roadside wall could provide important basis to extend the gob-side entry retaining technology. According to the summary of research results in recent years, combining with numerical modeling and practical experience, we emphasizedly analysed the influencing factors of roadside wall’s stability, such as the filling material’s mechanical properties, the filling wall’s geometric parameter, the roof’s rock structure, the stoping speed and so on, we can draw the conclusions that the high-water rapid hardening materials and the paste filling material have good load-supporting properties, the optimal value of the filling wall’s width is different in different conditions and the construction quality and so on have a great influence on the roadside wall’s stability, the results have some reference meanings in industrial test of gob-side entry retaining. Key words: gob-side entry retaining; roadside wall; high-water rapid hardening materials; numerical modeling; rational width 35 0 引言 沿空留巷是在上区段工