采动地基尾矿库在流固耦合作用下地基动力稳定分析  

Dynamic Stability Analysis of Mining-induced Foundation Tailings Reservoir under Fluid-solid Coupling

作　　者：王君 郎俊彪 李刚 高谦[1] 张军宁 Wang Jun;Lang Junbiao;Li Gang;Gao Qian;Zhang Junning(School of Civil and Resources Engineering,University of Science and Technology Beijing,Beijing 100083,China;Shen Kan Qinhuangdao Designing & Research Institute Corporation,MCC,Qinhuangdao 066001,China;Northeastern University at Qinhuangdao,Qinhuangdao 066001,China)

机构地区：[1]北京科技大学土木与资源工程学院,北京100083 [2]中冶沈勘秦皇岛工程设计研究总院有限公司,河北秦皇岛066001 [3]东北大学秦皇岛分校,河北秦皇岛066001

出　　处：《金属矿山》2019年第9期172-178,共7页Metal Mine

基　　金：国家高技术研究发展计划(863计划)项目(编号:SS2012AA062405)

摘　　要：通过有效应力理论分析及动孔压的应力应变模型推导地基震动液化的机理与判别公式,结合FLAC3D应用Finn模型进行流固耦合计算,用FISH语音编写超孔压比的计算公式,判断地震过程中的地基液化情况。根据计算得到的应力应变、孔压变化及超孔压比变化情况,分析了初期坝的浸润面变化情况,重点对考虑渗流作用的地基是否液化进行了详细分析,得到了不同位置的孔压、加速度、沉降位移、超孔压比等的变化情况,回归得到超孔压比与上覆岩层压力之间的函数关系。上述分析对本尾矿库的安全运营提供参考依据,为后期尾矿库的建设及使用提供了重要的分析基础资料,并用线性回归的方式总结出超孔压比与覆岩压力之间的关系,为快速判断尾矿库液化区域提供了便捷方法。The mechanism and discriminant formula of foundation liquefaction under vibration are deduced by means of effective stress theory analysis and dynamic pore pressure stress-strain model.Combining FLAC3 D with Finn model,the fluidsolid coupling calculation are made.FISH language was adopted to write the formula of the excess pore pressure ratio to judge the foundation liquefaction during earthquake.According to the variation of stress-strain,pore pressure and excess pore pressure ratio,the change of the saturation surface of the initial dam is analyzed,and whether the foundation is liquefied considering seepage is analyzed in detail.The pore pressure,acceleration,settlement displacement and excess pore pressure ratio at different locations are obtained,and functional relationship between excess pore pressure ratio and overlying strata pressure was achieved by regression.The above analysis provides a reference basis for the safe operation of the tailings reservoir,provides important basic data for the construction and use of the tailings reservoir in the later stage,and summarizes the relationship between excess pore pressure ratio and overburden pressure by means of linear regression.All these provide a convenient method for quickly judging the liquefaction area of the tailings reservoir.

关 键 词：采空区 流固耦合 尾矿库 液化分析 回归分析 

分 类 号：TD325[矿业工程—矿井建设]