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[1]谢意,曹海莹,周城屹,等.考虑土层界面效应的尾矿坝渗流稳定性分析*[J].中国安全生产科学技术,2024,20(6):154-160.[doi:10.11731/j.issn.1673-193x.2024.06.021]
　XIE Yi,CAO Haiying,ZHOU Chengyi,et al.Analysis on seepage stability of tailings dam considering soil-layer interface effect[J].JOURNAL OF SAFETY SCIENCE AND TECHNOLOGY,2024,20(6):154-160.[doi:10.11731/j.issn.1673-193x.2024.06.021]
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考虑土层界面效应的尾矿坝渗流稳定性分析*
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《中国安全生产科学技术》[ISSN:1673-193X/CN:11-5335/TB]

卷:
20
期数:
2024年6期
页码:
154-160
栏目:
职业安全卫生管理与技术
出版日期:
2024-06-30

文章信息/Info

Title:
Analysis on seepage stability of tailings dam considering soil-layer interface effect
文章编号:
1673-193X(2024)-06-0154-07
作者:
谢意; 曹海莹; 周城屹; 刘亮; 王强
（1.燕山大学 建筑工程与力学学院，河北 秦皇岛 066004；
2.燕山大学 河北省土木工程绿色建造与智能运维重点实验室，河北 秦皇岛 066004；
3.河北省地质矿产勘查开发局第八地质大队，河北 秦皇岛 066001）
Author(s):
XIE Yi;  CAO Haiying;  ZHOU Chengyi;  LIU Liang;  WANG Qiang
(1.School of Civil Engineering and Mechanics,Yanshan University,Qinhuangdao Hebei 066004,China;
2.Key Lab of Green Construction and Intelligent Maintenance for Civil Engineering of Hebei Province,Yanshan University,Qinhuangdao Hebei 066004,China;
3.The Eighth Geological Brigade,Hebei Bureau of Geology and Mineral Resources Exploration,Qinhuangdao Hebei 066001,China)
关键词:
尾矿坝; 土层界面效应; 渗流稳定性; 直剪试验; 数值模拟
Keywords:
tailings dam;  soil-layer interface effect;  seepage stability;  direct shear test;  numerical simulation
分类号:
X936
DOI:
10.11731/j.issn.1673-193x.2024.06.021
文献标志码:
A
摘要:
为研究渗流作用下尾矿土土层界面处力学行为对尾矿坝稳定性的影响，以河北省秦皇岛市某尾矿坝为研究对象，通过开展渗流直剪试验及FLAC3D数值建模，得出考虑土层界面效应的尾矿坝安全系数。研究结果表明：渗流状态下，随着水头高度上升，尾矿土抗剪强度下降；土层界面黏聚力呈下降趋势，内摩擦角变化幅度平缓；相同水头高度下，土层界面抗剪强度介于2种土层之间，尾细砂和尾粉质黏土界面黏聚力在多因素耦合作用下进一步降低；与Bishop法相比，考虑土层界面效应的尾矿坝在正常水位和洪水位下得到的安全系数分别下降29.0%，12.1%。研究结果可为多层尾矿土堆积而成的尾矿坝稳定性分析提供技术指导。
Abstract:
To investigate the influence of mechanical behavior at the soil-layer interface of tailings soil on the stability of tailings dam under the seepage conditions,a tailings dam in Qinhuangdao City,Hebei Province,was taken as the research object,and the safety factor of the tailings dam considering the soil-layer interface effect was derived by carrying out the seepage direct shear test and numerical modeling in FLAC3D.The results show that under the seepage conditions,the shear strength of tailings soil decreases as the water head height increases.The cohesive strength of the soil-layer interface decreases,while the variation in the internal friction angle is relatively gentle.At the same water head height,the shear strength of the soil-layer interface lays between those of the two soil layers,the cohesive strength of the soil-layer consisting of tailings fine sand and tailings silty clay is further reduced under multi-factor coupling effect.Compared to the Bishop method,the safety factors of the tailings dam considering the soil-layer interface effect under normal water level and flood conditions decrease by 29.0% and 12.1%,respectively.The research results can provide technical guidance for the stability analysis of tailings dams accumulated by multi-layer tailings soil.

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备注/Memo

备注/Memo:
收稿日期： 2024-01-05
* 基金项目： 国家自然科学基金项目 (51308486)；中央引导地方科技发展资金项目 (236Z5401G)；河北省自然科学基金面上项目(E2020203168)
作者简介： 谢意，硕士研究生，主要研究方向为岩土工程。
通信作者： 曹海莹，博士，教授，主要研究方向为岩土工程、土木工程智能建造工程。
更新日期/Last Update: 2024-06-25