基于GDEM-PDyna的尾矿库溃坝三维数值模拟分析研究  

Three-dimensional numerical simulation analysis of tailings dam break based on GDEM-PDyna

作　　者：付搏涛 李钢[1] 张红[2] 魏杰 褚衍玉 FU Botao;LI Gang;ZHANG Hong;WEI Jie;CHU Yanyu(China Academy of Safety Science and Technology,Beijing 100012,China;School of Energy and Mining Engineering,China University of Mining and Technology-Beijing,Beijing 100083,China)

机构地区：[1]中国安全生产科学研究院,北京100012 [2]中国矿业大学(北京)能源与矿业学院,北京100083

出　　处：《中国安全生产科学技术》2023年第2期71-77,共7页Journal of Safety Science and Technology

基　　金：国家重点研发计划项目(2021YFC3001300);中国安全生产科学研究院基本科研业务费专项资金项目(2022JBKY06)。

摘　　要：为进一步探究尾矿坝溃决后特有泥石流运移规律,掌握坝体破坏前至溃坝结束全流程发展状态,依托广东省某案例尾矿库为研究对象,采用基于有限元与离散元耦合方法的GDEM-PDyna软件构建泥石流类流体下泄演化数值模型,开展尾矿坝溃决演化分析,动态模拟尾矿库溃决过程中泥砂运动规律及淹没范围,并与MIKE 21软件计算结果进行对比。研究结果表明:尾矿坝溃决后,泥石流类流体流速升高、持续时间较短且尾砂流量发展迅速,2种模拟方法对比结果表明溃坝后坝基位置下泄流量变化与下游敏感点溃坝淹没深度变化情况一致。研究结果可为实现尾矿库下游重点区域灾害评估提供量化支撑,可有效提高尾矿坝溃决后灾害影响评估的精准性。In order to further explore the special migration law of debris flow after the tailings dam break,and master the development status of the whole process from dam failure to dam break,a case tailings pond in Guangdong province was taken as the research object,and the numerical model of fluid letdown evolution liking debris flow was constructed by using the GDEM-PDyna software based on the coupling method of finite element and discrete element.The evolution of tailings dam break was analyzed,then the movement law of mud and sand and the inundating range in the process of tailings dam break were dynamically simulated,and the results were compared with the calculation results of MIKE 21 software.The results showed that the flow rate of fluid liking debris flow increased for a short period of time and the tailings flow rate developed rapidly after the tailings dam break.The comparison between the two simulation methods indicated that the change of letdown flow rate at the dam foundation position after the dam break was consistent with the change of inundating depth at the sensitive points downstream.The calculation results can provide quantitative support for the disaster assessment of the key areas downstream of the tailings pond,and effectively improve the accuracy of disaster impact assessment after the tailings dam break.

关 键 词：尾矿坝 溃坝 数值模拟 灾害影响 

分 类 号：X936[环境科学与工程—安全科学]