基于复合注浆材料的断层破碎区巷道锚注支护  

Bolt-grouting support for roadway in fault fracture zone based on composite grouting material

作　　者：耿耀强 索永录[1] 赵腾飞 张红卫 胡国和 马小辉 GENG Yaoqiang;SUO Yonglu;ZHAO Tengfei;ZHANG Hongwei;HU Guohe;MA Xiaohui(College of Energy Science and Engineering,Xi’an University of Science and Technology,Xi’an 710054,China;Weinan Shaanxi Coal Qichen Technology Co.,Ltd.,Weinan 714000,China;National&Local United Engineering Research Center of Green Safety Efficient Mining,Xi’an 710065,China;Shaanxi Bingchang Mengcun Coal Mining Co.,Ltd.,Xianyang 712000,China)

机构地区：[1]西安科技大学能源学院,陕西西安710054 [2]渭南陕煤启辰科技有限公司,陕西渭南714000 [3]煤炭绿色安全高效开采国家地方联合工程中心,陕西西安710065 [4]陕西彬长孟村矿业有限公司,陕西咸阳712000

出　　处：《西安科技大学学报》2021年第4期616-623,共8页Journal of Xi’an University of Science and Technology

基　　金：国家自然科学基金项目(51474173);陕西省重点研发计划(2020GY-277)。

摘　　要：彬长矿区孟村煤矿中央一号回风大巷因高地应力、DF29大断层和强采动等多因素耦合作用,使得原有锚网索喷支护失效,导致围岩呈现变形大、破坏严重的问题。为此,利用钻孔勘探、地应力原位测量和实验室试验等技术获得断层区域内的地质构造和地应力赋存环境,探明了巷道围岩的变形破坏机理,研发了一种可注性好的反应温度低于95℃、抗压强度大于40 MPa的矿用复合注浆加固材料。并结合数值模拟所得围岩塑性破坏范围和分布特征,提出了一种以中空注浆锚索为核心的锚注补强支护技术,对其支护参数进行了优化。结果表明:该锚注补强支护技术在浅部围岩内形成厚度为4.5 m的注浆加固环,且通过注浆锚索与深部围岩形成一个整体,有效维持巷道围岩的稳定,为新型复合注浆加固材料在断层破碎区巷道围岩的锚注加固工程实践提供参考和技术支持。Due to the coupling effect of multiple factors such as high geostress,DF29 fault and strong mining,the original bolt-mesh-cable-shotcrete support fails in No.1 return airway of Mengcun coal mine in Binchang mining area,resulting in large deformation and serious damage of surrounding rock.To this end,the geological structure and stress occurrence environment in the fault area were obtained by drilling exploration,in-situ stress measurement and laboratory test,and the deformation and failure mechanism of roadway surrounding rock was proved.A kind of composite grouting reinforcement material for mine with good groutability was developed,with reaction temperature lower than 95℃and compressive strength greater than 40 MPa.Combined with the plastic failure range and distribution characteristics of surrounding rock obtained by numerical simulation,a bolt-grouting reinforcement support technology with high prestressed hollow grouting anchor cable as the core was proposed,and its support parameters were optimized.The results show that this bolt-grouting reinforcement technology forms a grouting reinforcement ring with a thickness of 4.5 m in the shallow surrounding rock,and forms a whole in the deep surrounding rock through the grouting anchor cable,which can provide reference and technical support for the anchor grouting reinforcement engineering practice of new composite grouting reinforcement material in roadway surrounding rock in fault fracture areas.

关 键 词：高地应力 断层破碎区 锚注支护 中空注浆锚索 复合注浆材料 

分 类 号：TD353[矿业工程—矿井建设]