深部巷道围岩承载圈演变规律与支护技术  

Evolution law of surrounding rock bearing circle and support technology of deep roadway

作　　者：申世豹 宋松 孟圣师 吴延成 郑义宁 SHEN Shibao;SONG Song;MENG Shengshi;WU Yancheng;ZHENG Yining(Guotun Mine,Shandong Energy Linyi Mining Group Heze Coal Power Co.,Ltd.,Heze 271004,China;School of Energy and Mining Engineering,Shandong University of Science and Technology,Qingdao 266590,China)

机构地区：[1]山东能源临沂矿业集团菏泽煤电有限公司郭屯煤矿,山东菏泽271004 [2]山东科技大学能源与矿业工程学院,山东青岛266590

出　　处：《煤矿安全》2023年第3期131-139,共9页Safety in Coal Mines

摘　　要：以郭屯煤矿-670辅助水平轨道巷为工程背景,通过承载圈力学模型分析巷道围岩应力变化,采用FLAC^(3D)软件对不同掘进距离、侧压系数和垂直应力下的巷道围岩应力变化进行研究;分析不同长度的锚杆和锚索对承载圈的控制作用。结果表明:随着巷道向深部扩展,承载圈也向巷道深部转移且厚度增加,巷道顶底板应力较两帮应力变化大,承载圈形状由圆形向椭圆形变化;发现锚杆主要控制承载圈内边界,减小巷道围岩浅部的破坏;锚索主要控制承载圈外边界,影响巷道围岩应力分布。根据承载圈理论及对锚杆锚索对承载圈的控制作用提出“锚网喷+锚杆+锚索”联合支护方案;应用表明:“锚网喷+锚杆+锚索”联合支护技术对该矿巷道围岩控制有较大的技术优势。Taking Guotun Coal Mine-670 auxiliary horizontal track roadway as the engineering background,the stress change of roadway surrounding rock is analyzed through the mechanical model of bearing circle,and the stress change of roadway surrounding rock under different driving distances,lateral pressure coefficients and vertical stresses is studied by FLAC^(3D) software.The resales show that as the roadway expands to the deep,the bearing ring also shifts to the deep and the thickness increases,the stress of the roof and floor of the roadway changes greatly than that of the two sides,and the shape of the bearing ring changes from circle to ellipse;the control effect of bolts and anchor cables with different lengths on the bearing ring is analyzed;the bolts mainly control the inner boundary of the bearing ring to reduce the damage of the shallow part of the roadway surrounding rock,and the anchor cables mainly control the outer boundary of the bearing ring and affect the stress distribution of roadway surrounding rock.According to the bearing ring theory and the control effect of bolt and anchor cable on the bearing ring,the combined support scheme of“bolt net shotcrete+bolt+anchor cable”is proposed.The application show that the combined support technology of“bolt net shotcrete+bolt+anchor cable”has great technical advantages for the control of surrounding rock in deep roadway.

关 键 词：深部巷道 承载圈 应力变化 数值模拟 联合支护 

分 类 号：TD353[矿业工程—矿井建设]