深井综采面动压区沿空留巷围岩变形机理及锚索强化支护技术  

Surrounding rock movement mechanism and cable reinforcement support technology for gobside entry retaining in the dynamic pressure area of deep fullymechanized mining face

作　　者：王方田[1,2] 江振鹏 刘超 何东升[1,4] 郝文华 屈鸿飞 WANG Fangtian;JIANG Zhenpeng;LIU Chao;HE Dongsheng;HAO Wenhua;QU Hongfei(School of Mines,China University of Mining and Technology,Xuzhou,Jiangsu 221116,China;State Key Laboratory for Fine Exploration and Intelligent Development of Coal Resources,China University of Mining and Technology,Xuzhou,Jiangsu 221116,China;Research Institute of Mine Artificial Intelligence,Chinese Institute of Coal Science,Beijing 100013,China;Yongmei Group Co Ltd,Yongcheng,Henan 476600,China)

机构地区：[1]中国矿业大学矿业工程学院,江苏徐州221116 [2]中国矿业大学煤炭精细勘探与智能开发全国重点实验室,江苏徐州221116 [3]煤炭科学研究总院有限公司矿山人工智能研究院,北京100013 [4]永城煤电集团股份有限公司,河南永城476600

出　　处：《采矿与安全工程学报》2024年第6期1103-1115,共13页Journal of Mining & Safety Engineering

基　　金：国家自然科学基金项目(52474151);中央高校基本科研业务费专项项目(2023YQNY02)。

摘　　要：深井综采面沿空留巷围岩受多重应力叠加作用,冒顶、帮鼓等问题亟待解决。以车集煤矿2611工作面沿空留巷为工程背景,采用理论分析、模拟分析和现场试验监测等方法,探究锚杆、锚杆-锚索、锚杆-锚索-补强锚索等不同支护方式下动压区沿空留巷围岩变形特征。基于顶板回转下沉弯矩叠加理论,构建动压区沿空留巷围岩结构力学模型,创新推导顶板弯曲下沉量计算公式,结合不同支护方案确定巷道顶板下沉量;充分考虑FLAC^(3D)与UDEC软件特点,对比模拟分析切顶与不切顶条件下沿空留巷围岩应力、变形特征,阐明锚杆、锚杆索及补强锚索与围岩相互作用关系,其中补强锚索支护具有强预紧力、长作用距离及应力传递的作用,能有效抑制顶板离层,致使围岩峰值应力向深处转移。现场监测结果表明,沿空留巷补强锚索支护后顶板下沉量为90 mm,保障了深井综采面安全高效开采。The surrounding rock for gob-side entry retaining in a deep fully mechanized mining face is subjected to multiple coupled stress effects,and problems such as roof caving and bulging urgently need to be solved.In this study,by taking the 261l working face of Juji Coal Mine as the engineering background,the deformation characteristics of surrounding rock for gob-side entry retaining in the dynamic pressure area with different support patterns including anchor rod,anchor rod-anchor cable,and anchor rod-anchor cable-reinforcement anchor cable were explored by means of theoretical analysis,simulation analysis,and on-site testing and monitoring.Based on the theory of bending moment superposition during rotary subsidence of roof,a structural mechanical model of surrounding rock for gob-side entry retaining in the dynamic pressure area was constructed,and the calculation formula of roof bending subsidence was innovatively deduced.With the aid of the above model and formular,the subsidence amounts of roadway roof under different support schemes were calculated.Furthermore,with full consideration of the characteristics of FLAC^(3D) and UDEC software,the stress and deformation characteristics of surrounding rock for gob-side entry retaining under roof cutting and non-roof cutting conditions were comparatively simulated.By doing so,the interactions between the surrounding rock and anchor rods,anchor cables,and reinforcement anchor cables were elucidated.Among them,reinforcement anchor cables,by virtue of their strong preload,long action distance,and stress transfer function,are capable of effectively suppressing roof delamination and inducing the transfer of the peak stress of the surrounding rock to the deep.The on-site monitoring results indicate that after the application of reinforcement anchor cables,the roadway roof for gobside entry retaining merely subsides by 90 mm,suggesting that reinforcement anchor cables contribute to ensuring safe and efficient recovery of deep fully mechanized mining face.

关 键 词：深井开采 动压区 沿空留巷 锚索强化支护 切顶卸压 

分 类 号：TD322[矿业工程—矿井建设]