Stability Analysis of the Surrounding Rock-Lining Structure in Deep-Buried Hydraulic Tunnels Having Seepage Effect

To clarify the factors affecting stability of deep-buried hydraulic tunnels containing pore water, elastoplastic theory and Mogi-Coulomb strength criterion were used to derive analytical solutions stress on surrounding rock-lining structure, tunnel wall displacement, plastic zone radius in rock under different operating conditions. During this process, seepage effect interaction considered. The influencing rules action, intermediate principal coefficient, lining permeability thickness structure investigated depth. results show that significantly changed distributions rock, reduced bearing reaction force, lowered stability. force was decreased considerably from stress, displacement obviously reduced. Moreover, reduced, increased with decrease coefficient. With increasing thickness, enhanced, an apparent restriction development appeared at beginning, but weakened subsequently. This research can theoretically provide references for analyzing water.