西安理工大学学报2017，Vol.33Issue(4)：402-407,485,7.DOI:10.19322/j.cnki.issn.1006-4710.2017.04.005
深部隧洞围岩分区破裂应力/应变分析及其破裂机理探讨
Analysis of the stress/strain of the zonal disintegration wall rock and discussion of its fracture mechanics in deep tunnel
摘要
Abstract
The zonal disintegration is a specific type fracture of the surrounding rock in the deep tunnel,which may take place when the stress is too large and parallel to the tunnel axial direction.In this paper,the stress-strain characteristics of the surrounding rock in the phenomenon of zonal disintegration are explained through an analysis of the engineering examples.A stressstrain equilibrium equation to the different zonal disintegration loop interface is established.Based on it,it is obtained that the radial displacement suddenly changes,and the tangential displacement continues in the loop interface,indicating that the occurrence of the new disintegration loop is due to the stress redistribution or energy balance of the surrounding rock.The ratio of the adjacent disintegration loops' radius is derived to obtain their proportional relationship.The occurrence of zonal disintegration is the result of large tectonic stress in the deep tunnel.The analysis results of engineering cases demonstrate the performance and effectiveness of the proposed model,which could provide a reference for the practical engineering application.关键词
岩石力学/深埋隧洞/围岩分区破裂/应力-应变特征Key words
rock mechanics/deep roadway engineering/the zonal disintegration of surrounding rock/stress-strain characteristics分类
建筑与水利引用本文复制引用
朱训国,陈卓立,赵德深..深部隧洞围岩分区破裂应力/应变分析及其破裂机理探讨[J].西安理工大学学报,2017,33(4):402-407,485,7.基金项目
国家自然科学基金资助项目(51374045) （51374045）
大连大学博士专项基金资助项目(08-6) （08-6）
