【摘要】 以金堆城栗西尾矿库为工程实例,采用数值模拟手段,研究了不同渗透系数下尾矿库加速度、应力、位移及液化区域的动力反应。结果表明:随着渗透系数的增大,加速度反应减小;耦合渗流后较耦合前的垂向有效应力明显减小,而耦合后两种渗透系数下的差别较小;剪应力在耦合渗流后增大,但耦合后渗透系数的变化对剪应力的影响很小;耦合前后坝体的垂向位移场发生了一定变化,耦合前坝体内的垂向位移以正位移为主,而耦合后很多地方变为负位移,且耦合后随着渗透系数的增大,位移也有所增大;液化区在耦合渗流后明显增大,而且随着渗透系数的增加,液化区域有所扩大。更多还原

【Abstract】 With Lixi tailings dam of Jinduicheng mine taken as engineering example,numerical simulation method was used to study the dynamic response of acceleration,stress,deformation and liquefied zone under different permeability coefficients.The results show that with the increased permeability coefficient,the acceleration response decreases.The vertical effective stress significantly decreases after coupling seepage,but there’s only a marginal difference between the two permeability coefficients.The shear stress increases after coupling seepage,but it is affected very weakly by the change of permeability coefficients.Before and after coupling seepage,there is a change in the vertical displacement fields,most of which are positive before coupling,but after coupling,they turn negative.In addition,with the increase of permeability coefficient,the displacement shows an improvement,liquefied zone increases significantly after coupling,and liquefied zone has somewhat expanded.更多还原