深埋矿山法隧道穿越岩层破碎带围岩稳定性研究

A Study on the Stability of Surrounding Rocks in Rock Fracture Zones for Tunnel Crossing with Deep Buried Mining Method

依托青岛地铁某区间深埋隧道穿越岩层破碎带工程,分析了隧道周围岩体变形机理,通过迈达斯有限元软件,对隧道开挖与支护过程中的围岩变形进行模拟分析,结合现场实际监测数据,对比分析得到:数值分析结果与实测数据相吻合,可以作为施工的依据;对于穿越岩层碎裂带的深埋隧道,拱顶及拱底是施工过程中围岩失稳的危险区域;采用本工程支护参数可以有效保证围岩-支护结构稳定性,为类似工程提供了工程经验。

Based on the engineering of a deep buried tunnel crossing a rock fragmentation zone in a certain section of Qingdao Metro,the deformation mechanism of the surrounding rock mass of the tunnel was analyzed.Through the use of Midas finite element software,the deformation of the surrounding rock during tunnel excavation and support was simulated and analyzed.Com-bined with actual monitoring data on site,the comparative analysis showed that the numerical analysis results were consistent with the measured data,which can be used as a basis for construction;For deep buried tunnels that pass through rock fragmen-tation zones,the arch crown and arch bottom are dangerous areas for rock instability during construction;The use of support parameters in this project can effectively ensure the stability of the surrounding rock support structure,providing engineering experience for similar projects.