超前注浆在巷道掘进过断层破碎带围岩控制中应用
Application of Advanced Grouting in Controlling Surrounding Rock of Tunnel Excavation through Fault Fracture Zones
李晓刚1
作者信息
- 1. 山西汾西矿业(集团)有限责任公司双柳煤矿,山西 柳林 033300
- 折叠
摘要
为确保双柳煤矿 5301 回风巷安全高效掘进通过BF36 断层,以及断层影响范围内巷道围岩稳定,提出采用"超前注浆+锚网索梁"组合方式控制围岩.通过超前注浆提高断层破碎带围岩整体稳定性,并为巷道掘进创造良好条件;采用锚网索梁方式为围岩提供较大的支护作用力,确保围岩稳定.工程应用后,回风巷在断层破碎带内掘进期间未出现漏顶、冒顶、片帮等问题,在断层影响范围内,巷道顶底板、巷帮变形量分别为 52、53 mm,围岩变形量整体较小,使回风巷安全掘进及围岩变形得到了有效控制.
Abstract
To ensure the safe and efficient excavation of the 5301 return air roadway in Shuangliu Coal Mine through the BF36 fault,as well as the stability of the surrounding rock of the roadway within the range affected by the fault,a combination method of"advanced grouting+anchor mesh cable beam"was proposed to control the surrounding rock.By advanced grouting,the overall stability of the surrounding rock in the fractured zone of the fault is improved,and good conditions are created for tunnel excavation;the anchor mesh cable beam method was used to provide greater support force to the surrounding rock,ensuring its stability.After engineering application,there were no problems such as roof leakage,roof caving,and slope fragmentation during the excavation of the return air roadway in the fault fracture zone.Within the range of fault influence,the deformation of the roadway roof,floor,and slope were 52 mm and 53 mm,respectively.The overall deformation of the surrounding rock was relatively small,which effectively controlled the safe excavation and deformation of the return air roadway.
关键词
巷道掘进/超前注浆/断层破碎带/地质构造/围岩支护Key words
roadway driving/advanced grouting/fault fracture zone/geological structure/surrounding rock support引用本文复制引用
出版年
2024
NETL
NSTL
维普
万方数据