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强震区高尾矿库动力有限元稳定性分析
- 作者：
于忠锋，孙少华
- 作者单位：
- （长沙有色冶金设计研究院有限公司）
基金项目：
- 国家重点研发计划项目（2022YFC2903905）
详细信息：
- 作者简介：
- 于忠锋（1985—），男，高级工程师，硕士，从事尾矿库设计工作；E⁃mail：541729739@qq. com
- PDF下载
Dynamic finite element stability analysis of high tailings pond in strong seismic areas
- English Author：
Yu Zhongfeng, Sun Shaohua
- Unit：
- （CINF Engineering Co., Ltd.）
- 摘要
- 在线预览
- 参考文献
摘要:
在强震区上游法粗尾砂筑坝采取有效抗震措施对保证尾矿库坝体安全十分重要。某尾矿库设计地震烈度为Ⅸ度，已安全运行多年，受地形条件限制，后期采用上游法加高扩容以满足矿山生产需求。根据尾矿库工程地质条件和加高库容设计方案，建立典型剖面有限元模型，采用尾砂和培土的动三轴试验结果参数，分析现状尾矿库和最终设计尾矿库在强震作用下的动力特征，研究设计抗震措施的有效性和坝体的安全稳定性。结果表明，设计采用的抗震方式有效、合理。研究成果可为尾矿库运行过程中的抗震措施提供科学依据，也可为类似工程提供一定参考。
关键词:
强震区；上游法；浸润线；抗震措施；液化；永久变形；有限元法；加速度反应
Abstract:
It is crucial to adopt effective seismic measures for dam construction using coarse tailings via theupstream method in strong seismic regions, so as to ensure the safety of tailings pond. A tailings pond designed with aseismic intensity of IX degrees has been operating safely for many years. Due to topographic constraints, the upstreammethod was employed in later stages to increase height and capacity to meet mine production demands. Based on theengineering and geological conditions and design scheme for capacity expansion, a finite element model of a typicalcross⁃section was established. Using parameters obtained from dynamic triaxial tests of tailings and silty clay, thedynamic characteristics of the current and final design tailings pond under strong seismic actions were analyzed.The effectiveness of the designed seismic measures and the safety stability of the dam were investigated. Results showthat the adopted seismic measures are effective and reasonable. The research outcomes can provide a scientific basisfor seismic measures during the operation of tailings pond and serve as a reference for similar projects.
Keywords:
strong seismic area; upstream method; phreatic line; seismic measure; liquefaction; permanent defor⁃mation; finite element method; acceleration response
