某尾矿坝坝体稳定性分析和锚固支护评估OA

This study takes a tailings dam in Shandong Province as the research object.Given its high dam structure,complex geological conditions,and potential environmental risks,the stability of the dam is evaluated under normal operation,flood operation,and special operational conditions(simultaneous occurrence of flood and earthquake)by applying the Swedish Circle Method for theoretical calculation and numerical simulation.Based on the stability analysis results and in view of the issue of deep-seated sliding,a staged anchor cable support scheme is proposed to explore the reinforcement effects of anchor cables with different lengths and inclination angles on the tailings dam.The research findings indicate that under unreinforced conditions,the safety factor of the dam under normal operation meets regulatory requirements.However,during flood operation and special operating conditions,the safety factors fall below the regulatory thresholds,posing instability risks.Under reinforced conditions,the length and inclination angle of the anchor cables exhibit a synergistic effect on stability improvement.The optimal support parameter combination for this dam is an anchor cable inclination angle of 20° and a length range of 50-105 m(adjusted according to the position of the sliding surface).Under normal,flood,and special operation conditions,the reinforced dam with this parameter combination satisfies regulatory requirements.The deformation rate and shear strain of the reinforced dam are reduced,effectively suppressing the propagation of the sliding surface.The study verifies the applicability of anchor cable reinforcement in tailings dam stabilization and provides a basis for parameter optimization in similar engineering projects.