近距离煤层回采覆岩运移规律及下伏巷道围岩变形特征研究  

Study on the movement law of overlying strata and the surrounding rock deformation characteristics of underlying roadways during close coal seams mining

作　　者：李振安 张振国 孙延斌 侯晓松 LI Zhen’an;ZHANG Zhenguo;SUN Yanbin;HOU Xiaosong(Jining Coal Mine Safety Production Monitoring Center,Jining,Shandong 272100,China;Zaozhuang Mining(Group)Fucun Coal Industry Co.,Ltd.,Jining,Shandong 277605,China)

机构地区：[1]济宁市煤矿安全生产监测监控中心,山东省济宁市272100 [2]枣庄矿业(集团)付村煤业有限公司,山东省济宁市277605

出　　处：《中国煤炭》2025年第4期76-85,共10页China Coal

摘　　要：针对近距离煤层开采下伏巷道受上部煤层覆岩运动影响显著的现象,采用物理相似模型试验、数值计算和理论分析的方法,探究了近距离煤层回采覆岩运移规律及下伏回采巷道围岩变形特征。研究结果表明:付村煤矿3_(下)煤层上部垮落带高度为29 m、导水裂缝带发育高度为95 m;3_(下)1001材料巷左帮塑性区最大深度为6 m,完全超出了锚杆支护范围,最大变形量为314 mm;右帮最大变形量为92 mm,小于左帮变形;底部浅部受拉,最大底鼓量为230 mm;顶板最大下沉量为91 mm。In response to the significant influence of overlying rock movement in the upper coal seam on the underlying roadway during close coal seams mining,physical similarity model experiments,numerical calculations,and theoretical analysis were used to explore the movement law of overlying rock during close coal seams mining and the deformation characteristics of the surrounding rock in the underlying roadway.The research results showed that the height of the upper collapse zone and the development height of the fracture zone in the third lower coal seam of Fucun Coal Mine were 29 meters and 95 meters respectively.The maximum depth of the plastic zone on the left side of the 1001 material roadway in the 3 lower coal seam was 6 meters,completely beyond the range of anchor rod support,with a maximum deformation of 314 mm.The maximum deformation of the right side was 92 mm,which was smaller than the deformation of the left side.The shallow bottom was under tension,with a maximum bottom bulge of 230 mm.The maximum subsidence of the top plate was 91 mm.

关 键 词：近距离煤层 覆岩运移 下伏巷道 围岩变形 

分 类 号：TD325[矿业工程—矿井建设]