尾矿坝沉积结构特征与性能演化规律研究进展

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...

Research progress on deposition structure characteristics and performance evolution law of tailings dam

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.