深埋隧洞板裂屈曲岩爆支护原则与关键技术  

Support principles and key technology of slab buckling rock burst in deep tunnel

作　　者：徐荣超[1] 周辉[2] 房敬年[3] 刘娉慧[1] Xu Rongchao;Zhou Hui;Fang Jingnian;Liu Pinghui(School of Resources and Environment,North China University of Water Resources and Electric Power,Zhengzhou 450045,China;Institute of Rock and Soil Mechanics,Chinese Academy of Sciences,Wuhan 430071,China;Yellow River Engineering Consulting Co.Ltd.,Zhengzhou 450003,China)

机构地区：[1]华北水利水电大学资源与环境学院,河南郑州450045 [2]中国科学院武汉岩土力学研究所,湖北武汉430071 [3]黄河勘测规划设计有限公司,河南郑州450003

出　　处：《华中科技大学学报（自然科学版）》2018年第8期110-115,共6页Journal of Huazhong University of Science and Technology(Natural Science Edition)

基　　金：国家重点基础研究发展计划资助项目(2014CB046902);国家自然科学基金资助项目(51709113);河南省科技攻关计划资助项目(172102310475);华北水利水电大学高层次人才科研启动项目(40479)

摘　　要：基于板裂屈曲岩爆的发生机制,提出了防治（以抑制板裂化围岩结构形成、降低岩爆发生概率为目的）与防护（以吸收岩块冲击动能、降低岩爆烈度为目的）相结合的岩爆支护原则.在分析岩爆灾害下不同类型支护结构工作机制的基础上,结合板裂屈曲岩爆防治与防护支护的功能需求,提出了建立以高强预应力锚杆为主体的岩爆防治体系及以吸能锚杆为主体的岩爆防护体系.针对岩爆冲击荷载作用下支护结构的脆断特性,提出了通过设置弹性缓冲装置的技术方法,提高岩爆支护系统的可靠性.Based on the evolution mechanism of slab buckling rock burst,support principles of combination of prevention which aims at suppressing the forming of slabbing structure thus reduce the occurrence probability of rock burst and protection which aims at absorbing the impact kinetic energy of rock thus reduce the intensity of rock burst was proposed for rock burst.The working mechanism and anchorage characteristics of different supporting structures were analyzed.Based on the functional requirements of slab buckling rock burst,high strength prestressed rock bolt and energy-absorbing bolt were proposed as the main supporting structure of prevention supporting system and protection supporting system respectively.In allusion to the brittle failure of support structure under the impact load of rock burst,the technique of setting up flexible buffer device was proposed to improve the reliability of support system.

关 键 词：深埋隧洞 岩爆 支护原则 岩爆防治与防护 关键技术 

分 类 号：U448[建筑科学—桥梁与隧道工程]