Engineering Practice of Surrounding Rock Stability Control of Deep Composite Strata TBM Tunneling Roadway in Coal Mines
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.
Deep composite strataFlac3D numerical simulationSurrounding rock stabilityEngineering practice
万方数据
维普
