| 基于流固耦合理论某尾矿坝失稳特性及稳定性分析 |
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| 引用本文： | 李强,张力霆,齐清兰,周占磊.基于流固耦合理论某尾矿坝失稳特性及稳定性分析[J].岩土力学,2012,33(Z2):243-250. |
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| 作者姓名： | 李强 张力霆 齐清兰 周占磊 |
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| 作者单位： | 1. 石家庄铁道大学 土木工程学院，石家庄 050043; 2. 石家庄铁道大学 道路与铁道工程安全保障省部共建教育部重点实验室, 石家庄 050043 |
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| 基金项目： | 国家自然科学基金项目资助(No.50908153) |
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| 摘 要： | 选用典型的尾矿库工程实例，采用流固耦合和强度折减法相结合对其尾矿坝进行稳定性分析，确定尾矿库渗流场分布及浸润线的位置，该浸润线位置与实测浸润线位置吻合较好。建议强度折减过程中尾矿坝的失稳准则，计算安全系数，确定潜在滑裂面的位置，并与极限平衡法计算出的安全系数及临界滑裂面位置进行比较，表明强度折减法得出的结果与Bishop法结果接近，流固耦合-强度折减法在尾矿库稳定性分析的可行性。在该基础上研究尾矿坝潜在的失稳模式，将尾矿坝潜在的失稳模式分为局部失稳和整体性失稳两种，局部失稳为尾矿坝的部分坝面发生滑移，整体失稳为整个尾矿坝坝体发生失稳，并分析导致该尾矿坝两种失稳模式的主要因素，认为浸润线埋深过浅是导致局部失稳的主要原因。
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| 关 键 词： | 流固耦合 强度折减法 尾矿坝 安全系数 稳定性 |
| 收稿时间： | 2011-11-21 |
Instability characteristics and stability analysis of a tailings dam based on fluid-solid coupling theory |
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| LI Qiang,ZHANG Li-ting,QI Qing-lan,ZHOU Zhan-lei.Instability characteristics and stability analysis of a tailings dam based on fluid-solid coupling theory[J].Rock and Soil Mechanics,2012,33(Z2):243-250. |
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| Authors: | LI Qiang ZHANG Li-ting QI Qing-lan ZHOU Zhan-lei |
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| Institution: | 1.School of Civil Engineering, Shijiazhuang Tiedao University, Shijiazhuang 050043, China; 2. Key Laboratory of Roads and Railway Engineering Safety Control of Ministry of Education, Shijiazhuang Tiedao University, Shijiazhuang 050043, China |
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| Abstract: | The stability analysis for a typical tailings dam is carried out by combining the fluid-solid coupling method with the strength reduction method. Then the seepage field, the location of potential sliding surface and the safety factor are determined; and the tailings dam failure criterion in strength reduction method for tailings dam is suggested. By comparison, the location of the saturation line by the above determined seepage field is in accordance with the field measured saturation line; meanwhile, the location of the potential sliding surface and the safety factor is well consistent with the results by Bishop method, so as to show the feasibility of the stability analysis for the tailings dam by combining the fluid-solid coupling method with the strength reduction method. Based on the above results, the instability model of the tailings dam is studied; and two instability models are concluded, one is the local instability which the instability takes place in the part of the tailings dam sliding; and the other is global instability which can cause the whole tailings dam failure. Moreover the main factors which lead to the two failure models are analyzed; and the result shows the important factor of the local instability is caused by the too shallow saturation line in the tailing dams. |
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| Keywords: | fluid-solid coupling theory strength reduction method tailings dam safety factor stability analysis |
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