渗流影响下尾矿库动力反应的数值模拟研究
|
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。
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.
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.
引文
[1]滕志国.关于尾矿坝地震稳定性的分析及评价[J].河北冶金,2003(1):16-17.TENG Zhiguo.Analysis and evaluation about tailings dam earthquake stability[J].Hebei Metallurgy,2003(1):16-17.
[2]柳厚祥,李宁,廖雪,等.考虑应力场与渗流场耦合的尾矿坝非稳定渗流分析[J].岩石力学与工程学报,2004,23(17):2870-2875.LIU Houxiang,LI Ning,LIAO Xue,et al.Unsteady seepage analysis of tailings dams considering coupling of stress andseepage fields[J].Chinese Journal of Rock Mechanics and Engineering,2004,23(17):2870-2875.
[3]吴远亮.尾矿坝的动力稳定性分析[D].西安:西安理工大学,2006:1-15
[4]徐则民,张倬元,许强,等.九寨黄龙机场填方高边坡动力稳定性分析[J].岩石力学与工程学报,2004,23(11):1883-1890.XU Zemin,ZHANG Zhuoyuan,XU Qiang,et al.Dynamic stability analysis of high fill slope of Jiuzhai-Huanglong airfield[J].Chinese Journal of Rock Mechanics and Engineering,2004,23(11):1883-1890.
[5]王平,胡再强,田春亮.陶家沟尾矿坝三维静力和动力稳定性分析[J].水利与建筑工程学报,2010,8(1):53-59.WANG Ping,HU Zaiqiang,TIAN Chunliang.3-D static and dynamic analysis on stability of taojiagou tailing dam[J].Jour-nal of Water Resources and Architectural Engineering,2010,8(1):53-59.
[6]陈士海,张安康,张子华.爆破地震作用下结构的损伤及动力响应分析[J].山东科技大学学报:自然科学版,2011,30(5):36-41.CHEN Shihai,ZHANG Ankang,ZHANG Zihua.Damage of structures and dynamic response analysis under the action ofblasting seism[J].Journal of Shandong University of Science and Technology:Natural Science,2011,30(5):36-41.
[2]柳厚祥,李宁,廖雪,等.考虑应力场与渗流场耦合的尾矿坝非稳定渗流分析[J].岩石力学与工程学报,2004,23(17):2870-2875.LIU Houxiang,LI Ning,LIAO Xue,et al.Unsteady seepage analysis of tailings dams considering coupling of stress andseepage fields[J].Chinese Journal of Rock Mechanics and Engineering,2004,23(17):2870-2875.
[3]吴远亮.尾矿坝的动力稳定性分析[D].西安:西安理工大学,2006:1-15
[4]徐则民,张倬元,许强,等.九寨黄龙机场填方高边坡动力稳定性分析[J].岩石力学与工程学报,2004,23(11):1883-1890.XU Zemin,ZHANG Zhuoyuan,XU Qiang,et al.Dynamic stability analysis of high fill slope of Jiuzhai-Huanglong airfield[J].Chinese Journal of Rock Mechanics and Engineering,2004,23(11):1883-1890.
[5]王平,胡再强,田春亮.陶家沟尾矿坝三维静力和动力稳定性分析[J].水利与建筑工程学报,2010,8(1):53-59.WANG Ping,HU Zaiqiang,TIAN Chunliang.3-D static and dynamic analysis on stability of taojiagou tailing dam[J].Jour-nal of Water Resources and Architectural Engineering,2010,8(1):53-59.
[6]陈士海,张安康,张子华.爆破地震作用下结构的损伤及动力响应分析[J].山东科技大学学报:自然科学版,2011,30(5):36-41.CHEN Shihai,ZHANG Ankang,ZHANG Zihua.Damage of structures and dynamic response analysis under the action ofblasting seism[J].Journal of Shandong University of Science and Technology:Natural Science,2011,30(5):36-41.
版权所有：© 2023 中国地质图书馆 中国地质调查局地学文献中心