降雨条件下尾矿坝饱和-半饱和渗流模拟分析

降雨条件下,由于渗透压力的存在,降低了尾矿坝坝坡的整体稳定性,可能产生坝体自身的变形和破坏,甚至导致尾矿库溃坝发生.针对某尾矿库,分析了降雨条件下对尾矿坝渗流及稳定的影响,运用饱和-非饱和渗流理论及降雨入渗理论,分析了尾矿坝渗流场的变化过程,根据计算出来的瞬态渗流场,利用非饱和尾砂抗剪强度理论,对尾矿坝的瞬态稳定性进行了分析.研究成果对于提高尾矿坝降雨条件下安全运行,降低尾矿库溃坝事故发生率具有重要意义.

Simulation analysis on tailings dam saturated and semi-saturation infiltration of under rainfall conditions

The tailings dam is the most important part of the milling production facilities,whose security and stability plays a vital role to the milling.The tailings dam is also a major hazard source.The volume expands continuously as the dam body increases gradually.Once the tailings dam failure happened,the tailings,mud and water in the pond will be poured out in the form of landslides,which will threat the lives and properties of downstream people and result immeasurable losses.The whole stability of the tailings dam can be reduced for the osmotic pressure under the rain fall conditions,which could result in the dam deformation and slope and even worse lead the tailings dam failure.Using the saturated and semi-saturation infiltration theory,the tailings dam seepage process and stability were analyzed under rain fall conditions.According to the calculated transient seeping field,the transient stability of the tailings dam was analyzed by the shear strength of unsaturated tailings theory.The simulation analysis is useful to improve the safe operation of tailings dam under rainfall conditions,also it is meaningful to reduce the tailings dam failure accident rate and help solve the safety problems in the tailings dam management and improve economic development and social stability.