岩土工程学报Issue(8)：1473-1482,10.DOI:10.11779/CJGE201408013
基于离散-连续耦合的尾矿坝边坡破坏机理分析
Failure mechanism analysis of tailing dams based on coupled discrete and continuous method
摘要
Abstract
Based on the numerical results from the finite difference method (FDM), a representative local area is selected to conduct discrete-continuous coupling analysis using FDM and discrete element (DEM). The macro-scale and meso-scale mechanical responses of a tailing dam slope before and after filling are simulated by using the above model. The numerical results indicate that for the continuous domain, the results are almost the same using non-coupled method and coupled method. The meso-scale mechanical response in the slip bands, such as distribution of force chain and development of soil fabric, can be analyzed by using the discrete domain to discuss the meso-mechanism of failure of tailing dams. The research shows that in the formation of slip bands, the soil anisotropies in and out of the slip bands are obviously different: with the increasing load, soil particles in the potential slip bands have significant displacement. The main direction of stress has a significant rotation. The rotation of particles changes the fabric distribution, which contributes to the formation of slip bands and the slope instability. The main direction of stress of soil outside the bands rotates to some degree, while the shear stress changes little. The proposed discrete-continuous coupling method can analyze the meso-mechanism of formation of slip bands during slope progressive failure.关键词
离散-连续耦合/数值模拟/尾矿坝边坡/破坏机理Key words
discrete-continuous coupling/numerical simulation/tailing dam slope/failure mechanism分类
建筑与水利引用本文复制引用
张铎,刘洋,吴顺川,汪成林..基于离散-连续耦合的尾矿坝边坡破坏机理分析[J].岩土工程学报,2014,(8):1473-1482,10.基金项目
国家自然科学基金项目（51178044，51174014）；新世纪优秀人才资助项目 （）
