Research on the Influencing Factors and Treatment Techniques of Bottom Bulging in Deep Buried Large Section Tunnels
In order to study the influencing factors of deep buried large section roadway floor heave and targeted comprehensive treatment measures,taking the 260303 track roadway as the engineering background,this paper conducts in-depth theoretical analysis of the influencing factors of deep buried large section roadway floor heave,and further proposes comprehensive treatment measures based on the analysis results.The results showed that the main reasons for the occurrence of floor bulges in track roadway 260303 were the complex geological stress environment,poor surrounding rock conditions,obvious rock hydration operations,and unreasonable original support forms,which resulted in multiple frequent occurrences of floor bulges in the roadway.Further comprehensive measures were proposed to change the shape of the original roadway,drill pressure relief holes,alternate long anchor cables and short anchor rods for joint support,and fully enclosed steel support with frictional sliding at the bottom.Through on-site monitoring,the deformation of the floor was reduced from 48 mm to 15mm,meeting the production needs of the mine,greatly reducing repair and maintenance projects,and ensuring safe and efficient production of the mine.
万方数据
维普
