摘要
岩体中结构面的存在降低了岩体的完整性与整体强度,对岩体的力学特性起着控制性作用,对岩爆的产生也有着不可忽视的影响。某山岭隧道围岩发育有大量产状近水平的结构面,在极高地应力作用下,岩爆频繁发生。以某山岭隧道岩爆案例作为分析对象,建立了层状岩体脆断失稳的临界应力计算公式,结合能量理论分析研究了层状岩体发生岩爆的力学机制和影响因素,在此基础上提出了岩爆防控措施。
The existence of structural planes in rock mass reduces the integrity and overall strength of rock mass. The mechanical properties of the rock mass play a controlling role and also have a significant influence on the occurrence of rock burst. A large number of near horizontal structural planes are developed in the surrounding rock of a mountain tunnel, and rock burst occurs frequently under the action of extremely high in-situ stress. In this paper, based on the formula of critical stress for brittle fracture instability of layered rock mass, the mechanical mechanism and influencing factors of rock burst are analyzed and studied combined with energy theory. On this basis, the prevention-control measures of rock burst are put forward.
作者
邹翀
潘岳
王华
ZOU Chong;PAN Yue;WANG Hua(Guangdong Provincial Key Laboratory of Intelligent Monitoring and Maintenance of Tunnel Structure,Guangzhou,Guangdong 511458,China;China Railway Tunnel Consultants Co.,Ltd.,Guangzhou,Guangdong 511458,China)
出处
《施工技术（中英文）》
CAS
2022年第18期90-95,共6页
Construction Technology
基金
中国中铁股份有限公司科技研究开发计划重大专项:高原超长深埋极端复杂地质隧道钻爆法修建技术体系与应用(cz02-专项-02)
中国中铁股份有限公司科技研究开发计划重点课题:高地应力隧道解重构理论与技术深化研究(2021-重点-44)。
关键词
隧道工程
层状岩体
岩爆
机理
防控
tunnels
stratified rock mass
rock burst
mechanism
prevention-control
