大断面巷道过陷落柱注浆加固技术应用

Application of Grouting Reinforcement Technology for Large Cross-section Roadway Crossing Subsidence Columns

为解决大断面巷道过围岩破碎陷落柱,在分析注浆加固机理的基础上,提出了具体注浆实施方案,经现场施工及表面位移观测,注浆加固提高围岩承载能力有效控制了巷道围岩变形。对大断面巷道过破碎陷落柱类似条件的巷道围岩支护具有实际借鉴意义。

In order to solve the broken subsidence column of surrounding rock over large section roadway,based on the analysis of grouting reinforcement mechanism,a specific grouting implementation scheme was proposed.After field construction and surface displacement observation,grouting reinforcement improved the surrounding rock bearing capacity.The ability effectively controlled the surrounding rock deformation of the roadway.It has practical reference significance for the surrounding rock support of the roadway with large cross-section roadway passing through the broken subsidence column.