摘要
为了进一步分析尾矿坝沉积结构特征与性能演化规律,本文综述国内外尾矿沉积规律、物理力学特性、服役性能演化规律及溃坝评价方法等有关尾矿坝安全稳定评价的研究现状,指出当前研究存在的不足。在尾矿库沉积规律的研究中,由于模型试验的流槽尺寸有限、边界效应较强,放矿条件不同,对尾矿沉积分布尚未得出一致性规律。而针对多种因素影响下的尾矿沉积结构特征目前还鲜有研究。尾矿固结时,其有效应力、孔隙比、渗透系数以及强度等性质在自重和上覆荷载作用下逐渐演化,且尾矿坝运行服役过程中排渗设施淤堵、地震等因素导致坝体性能演化,然而目前对尾矿坝性能时空演变的研究还相对欠缺。在安全评价方面,传统的极限平衡法存在明显缺陷。基于当前尾矿坝研究的不足,简要介绍了作者团队开发的尾矿沉积模型试验系统、多场耦合静动力性态分析平台及建立的复杂条件下高尾矿坝性能劣化理论,相关成果对于促进我国尾矿坝安全评价和灾害防治具有重要价值。
In order to further analyze the deposition structure characteristics and performance evolution law of tailings dam,the current status of domestic and international research on tailings deposition law,physical and mechanical properties,service performance evolution laws and evaluation methods of dam failure related to the safety and stability evaluation of tailings dam was reviewed,and the shortcomings of current research were pointed out.In the study field of tailings deposition law,the consistent law for the distribution of tailings deposition was still not obtained due to the limited size of flume and strong boundary effect in the model tests and different ore dumping conditions.In addition,there were few studies for the structural characteristics of tailings deposition under the influence of multiple factors.When the tailings were consolidated,their properties such as effective stress,pore ratio,permeability coefficient and strength gradually evolved under the effect of self-weight and overlying loads,and the performance of tailings dams evolved due to the factors such as clogging of drainage facilities and earthquake during the service period of tailings dam,but the current research on the spatial and temporal evolution of tailings dam performance was relatively insufficient.In terms of safety evaluation,the traditional limit equilibrium method had obvious defects.Based on the shortcomings of current research on tailings dam,the tailings deposition model test system,the multi-field coupled static and dynamic behavior analysis platform and the established performance degradation theory of high tailings dams under complex conditions developed by the authors’research team were briefly introduced.The results are of great value to promote the safety evaluation and disaster prevention and control of tailings dams in China.
作者
李全明
段志杰
于玉贞
师海
李振涛
LI Quanming;DUAN Zhijie;YU Yuzhen;SHI Hai;LI Zhentao(China Academy of Safety Science and Technology,Beijing 100012,China;State Key Laboratory of Hydroscience and Engineering,Tsinghua University,Beijing 100084,China;School of Civil Engineering,Beijing Jiaotong University,Beijing 100083,China)
出处
《中国安全生产科学技术》
CAS
CSCD
北大核心
2022年第2期6-19,共14页
Journal of Safety Science and Technology
基金
国家自然科学基金项目(51874260)
“十三五”国家重点研发计划项目(2017YFC0804602)。
关键词
尾矿坝
沉积结构
多场耦合
服役性能演化
安全评价
tailings dam
deposition structure
multi-field coupling
performance evolution
safety evaluation
