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以流固耦合的极限平衡法为基础,运用了泰勒级数法,对一铺膜防渗锰渣库在不同堆积高度的可靠度和失稳概率进行了计算分析,并参照美国陆军工程兵团对于岩土边坡的失稳概率评价标准,对锰渣库在运行过程中的边坡失稳风险进行了评估。分析表明:铺膜防渗的电解锰渣坝,当沿用常规不防渗尾矿坝设计时,边坡失稳概率过高,应通过增加导渗体数量、降低边坡坡度、放缓渣库上升速度等设计优化措施,降低锰渣库边坡失稳风险;对于影响渣库边坡稳定的重要参数,如抗剪强度、渗透系数、界面抗剪强度等,有必要通过高质量的取样和审慎的试验获得可靠的试验数据,以降低参数的不确定性,进而增加预期安全水平。
Based on the limit equilibrium method of fluid-solid coupling, Taylor series method is used to calculate and analyze the reliability and instability probability of a membrane seepage-proof manganese slag bank at different pile heights. According to the calculation result of the United States Army Corps of Engineers The evaluation criteria of the instability probability of rock and soil slope are used to evaluate the risk of slope instability during the operation of the manganese slag bank. The analysis shows that when the seepage-proof electrolytic manganese slag dams are used, the probability of slope instability is too high when the conventional seepage-proof tailings dams are used. By increasing the amount of seepage infiltration bodies, reducing slope slope, Such as shear strength, permeability coefficient, interface shear strength, etc., it is necessary to pass high-quality sampling and Prudent testing Get reliable test data to reduce parameter uncertainty and thus increase expected safety levels.