摘要
高应力巷道发生底鼓及顶板失稳等现象应区分两种情况,即巷道全周边弱支护与局部弱支护。后一种情况,围岩从弱支护部位鼓出,到一定程度则诱发牢固支撑部位支架破坏,发展过程呈缓慢～急剧形式。局部弱支护又是巷道支护工程中的常见现象,也是理论上缺乏深入研究的问题。以弹性及粘弹性理论为基础,结合实例计算,分析了高应力巷道局部弱支护机理,阐述了底鼓与顶、帮失稳相互诱发的原因,为巷道支护结构设计提供新的理论依据。
The instability happens in high-stress tunnels in two cases, full supporting or short supporting. Tunnel bracing will be destroyed at the short supporting position when the rock popping-out is large enough. The short supporting is a common phenomena with lack of researching. The analysis of partial short supporting effect is studied on the basis of elastic and viscoelastic theory. The mechanism of heaving and instability of roof and side wall is analyzed. As a result, a new rationale is proposed for the design of tunnel support.
出处
《岩石力学与工程学报》
EI
CAS
CSCD
北大核心
2004年第12期2001-2004,共4页
Chinese Journal of Rock Mechanics and Engineering
基金
教育部重点科技项目(No.01089)资助课题。
