冲击动载下锚固节理岩体剪切破坏模拟研究  

Simulation Study on Shear Failure of Anchored Jointed Rock Mass Under Impact Dynamic Load

作　　者：翟乾钰 宁建国[1,2] 王俊[1,2] 史新帅 王开[3] 段宏飞 ZHAI Qianyu;NING Jianguo;WANG Jun;SHI Xinshuai;WANG Kai;DUAN Hongfei(State Key Laboratory Cultivation Base for Mine Disaster Prevention and Control Jointly Built by the Ministry of Co-construction,Shandong University of Science and Technology,Qingdao,Shandong 266590,China;School of Energy and Mining Engineering,Shandong University of Science and Technology,Qingdao,Shandong 266590,China;School of Mining Engineering,Taiyuan University of Technology,Taiyuan,Shanxi 030024,China;Jinneng Holding Shanxi Institute of Science and Technology Co.,Ltd.,Taiyuan,Shanxi 030032,China)

机构地区：[1]山东科技大学矿山灾害预防控制省部共建国家重点实验室培育基地,山东青岛市266590 [2]山东科技大学能源与矿业工程学院,山东青岛市266590 [3]太原理工大学矿业工程学院,山西太原030024 [4]晋能控股山西科学技术研究院有限公司,山西太原030032

出　　处：《矿业研究与开发》2024年第3期121-127,共7页Mining Research and Development

基　　金：国家自然科学基金青年科学基金项目(51904163);国家自然科学基金面上项目(52074170).

摘　　要：为探究冲击动载下不同节理角度对锚固节理岩体剪切破坏的影响规律,基于ABAQUS软件开展了动载冲击下不同节理角度锚固岩体的动态剪切数值模拟研究,系统分析了动载冲击下锚固节理岩体的剪切破坏演化过程及锚杆发生剪切破坏时的切应变、切应力与剪切位移,并依据理论分析提出了最优锚固角方案。研究结果表明:动载冲击过程中,锚杆与岩体在不同冲击时期分别提供了不同程度的锚固系统抗剪力;当锚固岩体节理角度为60°时,锚杆发生剪切破坏所产生的切应变、切应力与剪切位移最大,90°次之,45°最小;通过最佳锚固角估算公式验证了最优锚固角在60°至70°范围内。研究成果对动载巷道节理岩体的加固工程具有一定的指导和借鉴意义。In order to explore the influences of different joint angles on the shear failure of anchored jointed rock mass under impact dynamic load,the dynamic shear numerical simulation of anchored rock mass with different joint angles under dynamic load impact was carried out based on ABAQUS software.The shear failure evolution process of anchored jointed rock mass under impact dynamic load,as well as the shear strain,shear stress and shear displacement of anchor rod when shear failure occurs were systematically analyzed.And the optimal anchorage angle scheme was proposed based on theoretical analysis.The results show that in the process of dynamic load impact,the bolt and rock mass provide different degrees of shear resistance of anchorage system in different impact periods.The shear strain,shear stress and shear displacement generated by the shear failure of the bolt are the largest when the joint angle of the anchored rock mass is 60°,larger than that at 90°,and reach the smallest at 45°.The optimal anchorage angle was verified in the range of 60°-70°by the optimal anchorage angle estimation formula.The research results have a certain guidance and reference significance for the reinforcement engineering of jointed rock mass in dynamic roadway.

关 键 词：节理岩体 锚固 剪切特性 冲击动载 数值模拟 

分 类 号：TD315.3[矿业工程—矿井建设]