In order to explore the stability control mechanism of the surrounding rock of Tunnel Boring Machine(TBM)tunneling roadway in deep composite stratas,a deep rock roadway in the Huainan Mining area is taken as the background,and the numerical model of hard rock,soft rock strata and composite rock strata is established based on the Flac3D numerical simulation software under the same support conditions.TBM excavation and support scheme is optimized by analyzing the distribution and evolution law of the displacement cloud map,stress cloud map and the plastic zone of the surrounding rock.Through the monitoring of the deformation of the surrounding rock and the axial force of the bolt,combined with the results of numerical simulation and field measurement,it is concluded that there is obvious asymmetry in the displacement,stress cloud diagram and plastic zone of the compos-ite rock formation,and the weak rock strata in the composite rock strata should be strengthened.
关键词
深部复合地层/Flac3D数值模拟/围岩稳定/工程实践
Key words
Deep composite strata/Flac3D numerical simulation/Surrounding rock stability/Engineering practice
维普
万方数据