软岩巷道破坏机理与支护技术研究
Research on the Failure Mechanism and Support Technology of Soft Rock Tunnels
李向福 1曹臣 1廉万 1赵军1
作者信息
- 1. 内蒙古黄陶勒盖煤炭有限公司,内蒙古 鄂尔多斯 017300
- 折叠
摘要
针对33104 运输巷道围岩变形量大问题,在原锚喷支护的基础上,提出采用锚注支护提高围岩稳定性.通过模拟注浆前后巷道应力和位移变化情况可知,锚注支护后围岩承载能力提高,在浅部围岩形成锚固体,应力峰值向深部转移,浅部围岩处于应力降低区.同时,注浆能将松散破碎围岩胶结成整体,可以提高围岩承载能力,围岩变形量得到明显改善,支护效果明显.
Abstract
In response to the problem of large deformation of the surrounding rock in the 33104 transportation channel,based on the original anchor spray support,it is proposed to use anchor injection support to improve the stability of the surrounding rock.By simulating the changes in stress and displacement of the tunnel before and after grouting,it can be seen that the bearing capacity of the surrounding rock is improved after anchor grouting support,and anchor solids are formed in the shallow surrounding rock.The stress peak shifts to the deep,and the shallow surrounding rock is in a stress reduction zone.At the same time,grouting can bond loose and fractured surrounding rock into a whole,improve the bearing capacity of the surrounding rock,significantly improve the deformation of the surrounding rock,and achieve significant support effects.
关键词
软岩/锚注支护/应力峰值/围岩变形Key words
soft rock/anchor grouting support/peak stress/surrounding rock deformation引用本文复制引用
基金项目
内蒙古自治区自然科学基金(2020MS05011)
出版年
2024
NETL
NSTL
万方数据