摘要
沟底纵坡是尾矿库选址中考虑的重要因素之一。针对高地震烈度区、陡底坡上游法尾矿坝,采用有限元法对尾矿坝动力响应及稳定性进行分析,研究了坝体动力加速度、地震永久变形、液化情况及动力抗滑稳定性。结果表明:9度地震条件下,陡底坡尾矿坝动力响应较大,坝顶加速度放大系数2.16倍,坝体沉陷及向下游方向位移较大,液化区主要集中在库内浸润线以下尾砂层内,动力抗滑稳定安全系数1.065,能够满足动力稳定要求。研究成果可为类似工程的研究及设计提供参考。
The ratio of base slope is one of the important factors during damsite selecting of tailings dam.Based on one upstream tailings dam located on steep slope in high seismic intensity area,the dynamic response and dam stability ware studied by using the method of FEM.The response of acceleration,permanent deformation,liquefaction region and stability of dam in the condition of grade 9.0 earthquake intensity ware analyzed in detail.The results show that under the earthquake with M=9.0,the response of acceleration of tailings dam is more with amplification coefficient of 2.16 times,the larger permanent deformation and displacement toward downstream also appeared on the top of dam,the liquefaction region appeared in tailings under saturation line in the pond,the minmum safety factor of the dynamic time history is 1.065,which can meet the specification.The results can provide reference for similar engineering research and design.
作者
郄永波
周汉民
崔旋
QIE Yongbo1,2 , ZHOU Hanmin1,2 , CUI Xuan1,2(1. BGRIMM Technology Group, Beijing 102628, China; 2. Beijing Key Laboratory of Nonferrous Intelligent Mining Technology, Beijing 102628, Chin)
出处
《中国矿业》
北大核心
2018年第B06期390-393,399,共5页
China Mining Magazine
基金
国家重点研发计划项目资助(编号:2017YFC0804608)
关键词
尾矿坝
陡底坡
强震
动力响应
坝体稳定性
railings dam
steep base slope
high seismicity
dynamic response
dam stability
