近距离煤层采空区下沿空留巷顶板结构控制与合理巷旁支护研究  

Research on roof structure control and rational roadside support for gob-side entry retaining under close-distance coal seam goaf

作　　者：褚心瑜 崔海峰 李振安 高海滨 朱凌卓 CHU Xinyu;CUI Haifeng;LI Zhenan;GAO Haibin;ZHU Lingzhuo(College of Energy and Mining Engineering,Shandong University of Science and Technology,Qingdao,Shandong 266590,China;Jining Xinneng Thermal Power Co.,Ltd.,Jining,Shandong 272004,China;Jining Coal Mine Safety Production Monitoring and Control Center,Jining,Shandong 272000,Chian;Shandong Xinchazhuang Mining Co.,Ltd.,Taian,Shandong 271608,China)

机构地区：[1]山东科技大学能源与矿业工程学院,山东省青岛市266590 [2]济宁鑫能热电有限公司,山东省济宁市272004 [3]济宁市煤矿安全生产监测监控中心,山东省济宁市272000 [4]山东新查庄矿业有限责任公司,山东省泰安市271608

出　　处：《中国煤炭》2025年第2期45-58,共14页China Coal

基　　金：国家自然科学基金资助项目(51774195);煤炭资源高效开采与洁净利用国家重点实验室开放基金资助项目(2021-KFYB-020)。

摘　　要：为实现近距离煤层采空区安全沿空留巷,解决巷道围岩变形严重难题,以山东新查庄矿业有限责任公司采空区下91006工作面的沿空留巷工程为背景,采用理论分析及现场工业性试验等研究手段,研究了基本顶破断规律与应力演化规律,建立了近距离煤层沿空留巷顶板力学模型,并利用结构力学理论和矿压理论计算分析出基本顶岩层在不同位态下的巷旁支护阻力计算公式,通过对比分析水力压裂断顶卸压前后巷旁支护阻力变化发现水力压裂断顶卸压大大降低了巷旁支承压力,并在91006工作面采用“水力压裂超前断顶卸压+钢管混凝土墩柱高强巷旁支护”组合技术方案开展现场工业性实验,结果显示巷道顶底板变形量稳定,整体留巷成型效果良好。To achieve safe gob-side entry retaining in close-distance coal seams and address the severe deformation problem of roadway surrounding rocks,this paper takes the gob-side entry retaining project of 91006 working face under the goaf of Xinchazhuang Mining Co.,Ltd.in Shandong Province as the background.By employing research methods such as theoretical analysis and on-site industrial tests,the fracture law of the main roof and the stress evolution law are studied.A mechanical model of the roof for gob-side entry retaining in close-distance coal seams is established.The calculation formulas for the roadside support resistance of the main roof strata under different positions are analyzed and calculated using structural mechanics theory and strata pressure theory.Through comparative analysis of the changes in roadside support resistance before and after hydraulic fracturing for roof cutting and pressure relief,it is found that hydraulic fracturing for roof cutting and pressure relief significantly reduces the abutment pressure beside the roadway.The combined technical scheme of“advance hydraulic fracturing for roof breaking and pressure relief+high-strength roadside support with concrete-filled steel tube piers”is adopted for on-site industrial tests in 91006 working face.The results show that the deformation of the roof and floor of the roadway is stable,and the overall entry retaining effect is good.

关 键 词：近距离煤层 沿空留巷 顶板运动规律 断顶卸压 巷旁支护阻力 

分 类 号：TD353[矿业工程—矿井建设]