【摘要】 针对尾矿库安全运行问题,对尾矿库地层进行合理概化,利用曲面拟合方法建立三维数值模型,采用非线性方法计算尾矿堆积坝动力响应,分析其动力稳定性。结果表明,堆积坝在地震作用下会有较大变形,主要体现在堆积坝顶部附近,而碾石压坡体部分受地震影响最大,由于其为废石块体碾压堆积而成,会出现一定程度的破坏,应进行加固处理,而沉积滩超孔压比尚未达到液化临界值,不会出现液化现象,但其值较高,应加强库区排水,降低浸润线埋深,防止地震造成液化破坏。更多还原

【Abstract】 Aimed at the problems of safe operation in tailings reservoir,the strata of tailings reservoir was generalized reasonably.Then,a 3D numerical model was built based on the curve and surface fitting method,the dynamic response of tailing stacking dam was calculated by nonlinear method and its dynamic stability was analyzed.The results indicated that the large deformation appeared on the stacking dam under the earthquake,mainly around the top of the stacking dam,yet the rolling rock upon slope was affected by the earthquake the most.Because it was comprised of rolled and stacked waste rocks and could emerge a certain degree of destruction,this part of slope should be reinforced.Whereas the excess pore-pressure ratio of deposited beach did not reach to the liquefaction critical value,so the liquefaction phenomenon would not occur.But the value was still high,the drainage of the reservoir should be strengthen and the depth of seepage line also should be reduced,so as to prevent liquefaction destruction caused by the earthquake.更多还原