Optimization Practice of Deep Mine Roadway Support Scheme in TBM Mining
In response to the lack of standardized rock support schemes for TBM excavation construction in deep coal mine tunnels,and the need to simultaneously consider support strength and construction speed,numerical simulations of TBM excavation tunnels were conducted based on the physical and mechanical properties of the deep geological strata and the parameters of the geostress field in coal mines.The evolution laws of the rock stress field and displacement field under different support schemes were obtained,and a reasonable support scheme was se-lected and applied in TBM excavation of deep coal mine tunnels.The on-site monitoring data of the project shows that on the 70th day after the excavation of the tunnel,the subsidence of the roof and the convergence of the two sides stopped increasing,and the axial force of the anchor rod stopped increasing.The support scheme adopted meets the needs of controlling the stability of the surrounding rock of the tunnel.
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