摘要
为确保甘肃某新建尾矿库正常使用时坝体稳定性达标、无溃坝风险,本文利用有限元法及极限平衡法对新建尾矿库进行坝体稳定性分析,用以指导企业优化尾矿库的建设和管理,有效防范坝体失稳溃坝。文中渗流计算通过有限元法结合的方式确定浸润线,稳定计算采用瑞典圆弧法和简化毕肖普法得到尾矿坝在正常工况、洪水工况和特殊工况下6个典型断面的安全系数。结果表明:尾矿坝所有断面的安全系数均满足要求,正常工况下东南中侧断面(D)的安全系数最小,洪水工况和特殊工况下东北侧的砂场开采至设计深度时计算所得的断面(A)安全系数最小;砂场开采至设计深度与砂场回填相比,砂场回填能有效提升尾矿坝的稳定性。
In order to ensure that the dam stability of a newly built tailings pond in Gansu province meets the standard and there is no dam break risk during normal use,the finite element method and limit equilibrium method are used to analyze the dam stability of the newly built tailings pond,so as to guide enterprises to optimize the construction and management of the tailings pond and effectively prevent dam instability and dam break.In the seepage calculation,the infiltration line is determined by the finite element method,and the safety factors of six typical sections under normal working conditions,flood working conditions and special working conditions are obtained by the Swedish circular arc method and the simplified Bishop method.The results show that the safety coefficients of all sections of the tailings dam meet the requirements.The safety coefficients of the middle section(D)in the southeast of the tailings dam under normal working conditions are the least,and the safety coefficients of the section(A)calculated when the sand field in the northeast is mined to the design depth under flood conditions and special working conditions are the least.Compared with the backfilling in the sand field,the stability of the tailings dam can be improved effectively.
作者
鲁森
唐垒
陈建军
徐建超
LU Sen;TANG Lei;CHEN Jianjun;XU Jianchao(Cathay Safety Technology Co.,Ltd.,Beijing 102200,China;Gansu Jiusteel Group Hongxing Steel Co.,Ltd.,Jiayuguan 735100,Gansu,China;Baotou City Emergency Comprehensive Support Center,Baotou 014010,Inner Mongolia,China)
出处
《矿产勘查》
2024年第S01期169-177,共9页
Mineral Exploration
基金
国家矿山安全监察局安全生产科研攻关项目(第一批)“大型矿山超高陡边坡透明化监测预警技术研究”资助。
关键词
尾矿库
溃坝模拟
风险评估
有限元法
tailings reservoir
dam break simulation
risk assessment
finite element method
