软弱破碎围岩锚固孔树脂锚固剂流失对锚固性能影响研究  

Study on the influence of resin loss of the borehole on the anchoring performance in the soft and broken surrounding rock

作　　者：付孟雄 黄帅帅 刘少伟[1,2] 贺德印 张建英 郭重托 FU Mengxiong;HUANG Shuaishuai;LIU Shaowei;HE Deyin;ZHANG Jianying;GUO Zhongtuo(School of Energy Science and Engineering,Henan Polytechnic University,Jiaozuo,Henan 454000,China;Collaborative Innovation Center of Coal Work Safety and Clean High Efficiency Utilization,Henan Polytechnic University,Jiaozuo,Henan 454000,China;Yili Yongning Coal Industry Chemical Co.,Ltd.,Yining,Xinjiang 844500,China)

机构地区：[1]河南理工大学能源科学与工程学院,河南焦作454000 [2]煤炭安全生产与清洁高效利用省部共建协同创新中心,河南焦作454000 [3]伊犁永宁煤业化工有限公司,新疆伊宁844500

出　　处：《中国矿业大学学报》2024年第3期483-496,共14页Journal of China University of Mining & Technology

基　　金：国家自然科学基金项目(52104083,52074102);河南省科技攻关项目(242102321105)。

摘　　要：树脂锚固剂作为锚杆与围岩的重要黏结剂,在锚固剂搅拌时软弱破碎围岩锚固孔壁裂隙可能会造成树脂锚固剂流失,影响锚固性能.因此,本文首先开展了基于3D打印高透光锚固孔裂隙模型的树脂锚固剂流失可视化试验,然后采用理论分析、数值模拟及实验室试验方法分析了树脂锚固剂流失对锚固性能的影响.结果表明:树脂与固化剂在锚杆运动作用下会快速向锚固孔壁裂隙流动,并在裂隙内部形成固化结构,使锚固长度缩短,系统的锚固性能随着裂隙数量、张开度、倾角及树脂锚固剂流入深度的增加而降低.围岩注浆改性、增加树脂锚固剂药卷数量以及锚固孔扩孔技术可削弱锚固剂流失带来的影响,提出了树脂锚固剂流失条件下锚固剂药卷用量计算表达式.本文可为软弱破碎围岩控制与锚固质量提升方法研究提供一定参考.Resin cartridge is the main adhesive between the bolt and surrounding rock. Fractures in the borehole wall of soft and broken surrounding rock may cause resin loss and affect anchoring performance. Therefore, a resin loss visualization experiment based on a 3D printed high transmittance borehole fractured model was conducted, and the influence of resin loss on anchoring performance was analyzed through theoretical analysis, numerical simulation, and laboratory experiments. The results show that in the process of bolt rotates and passes through the resin cartridge, the resin and curing agent will flow rapidly to the fracture of the borehole wall under the action of the motion of the bolt, and a solidification structure will be formed inside the fracture. So that the anchoring length is shortened, and the amount of resin loss is positively correlated with the fracture aperture and the number of fractures. The grouting reinforcement of soft and broken surrounding rock, increasing the number of resin cartridges, and borehole reaming technology can weaken the influence of resin loss. A formula for calculating the length of resin cartridges based on resin loss is proposed. The paper can provide a certain theoretical reference for the research on the control and anchoring quality improvement of soft and broken surrounding rocks.

关 键 词：锚杆支护 软弱破碎围岩 孔壁裂隙 树脂锚固剂流失 锚固性能 

分 类 号：TD353[矿业工程—矿井建设]