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[1]杨春和,张超,马昌坤,等.高应力条件下尾矿破碎特性及坝体稳定性研究*[J].中国安全生产科学技术,2022,18(2):20-26.[doi:10.11731/j.issn.1673-193x.2022.02.002]
　YANG Chunhe,ZHANG Chao,MA Changkun,et al.Study on tailings breakage characteristics and dam stability under high stress conditions[J].JOURNAL OF SAFETY SCIENCE AND TECHNOLOGY,2022,18(2):20-26.[doi:10.11731/j.issn.1673-193x.2022.02.002]
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高应力条件下尾矿破碎特性及坝体稳定性研究*
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《中国安全生产科学技术》[ISSN:1673-193X/CN:11-5335/TB]

卷:
18
期数:
2022年2期
页码:
20-26
栏目:
特约专栏
出版日期:
2022-02-28

文章信息/Info

Title:
Study on tailings breakage characteristics and dam stability under high stress conditions
文章编号:
1673-193X(2022)-02-0020-07
作者:
杨春和; 张超; 马昌坤; 李雪婷; 马垒
(1.中国科学院武汉岩土力学研究所 岩土力学与工程国家重点实验室，湖北 武汉 430071；
2.中科院武汉岩土力学研究所 矿山边坡安全风险预警与灾害防控应急管理部重点实验室，湖北 武汉 430071)
Author(s):
YANG Chunhe;  ZHANG Chao;  MA Changkun;  LI Xueting;  MA Lei
(1.State Key Laboratory of Geomechanics and Geotechnical Engineering,Institute of Rock and Soil Mechanics,Chinese Academy of Sciences,Wuhan Hubei 430071,China；
2.Key Laboratory of slope safety risk warning and disaster prevention and mitigation,Ministry of Emergency management,Institute of Rock and Soil Mechanics,Chinese Academy of Sciences,Wuhan Hubei 430071,China)
关键词:
尾矿坝; 高应力; 破碎指标; 强度准则
Keywords:
tailings dam;  high stress;  breakage indicator;  strength criterion
分类号:
X936
DOI:
10.11731/j.issn.1673-193x.2022.02.002
文献标志码:
A
摘要:
高应力条件下尾矿破碎特性与坝体稳定性研究是高尾矿坝避免溃坝事故的重要参考。分析尾矿颗粒破碎过程中级配曲线的演化规律，提出采用BET测试颗粒比表面积以定量化表征颗粒破碎指标;在室内高应力三轴试验的基础上，阐述高应力条件下尾矿的力学行为，提出高应力条件下尾矿强度准则，并基于该准则对工程实例进行应用分析。结果表明：相比于常用破碎指标，从能量观点出发的BET法比表面积表征尾矿颗粒破碎更为合理;采用线性Mohr-Coulomb准则计算尾矿在低应力阶段的内摩擦角，采用幂函数Mohr强度准则计算尾矿在高应力阶段的内摩擦角;提出1套考虑高应力条件下尾矿强度折减的坝体稳定性分析方法，以供实际工程参考。
Abstract:
The study of tailings breakage characteristics and dam stability under high stress conditions is the important reference for high tailings dams to avoid the dam break accidents.The evolution law of the gradation curve during the breaking process of tailings particles was analyzed,and the specific surface area of the particles was measured by BET to quantitatively characterize the particle breaking indicators.Based on the indoor high stress triaxial tests,the mechanical behavior of tailings under high stress conditions was explained,and the tailings strength criterion under high stress conditions was proposed.Based on the tailings strength criterion under high stress conditions,the application analysis of engineering example was carried out.The results showed that compared with the commonly used breaking indicators,the BET method from the energy point of view was more reasonable to characterize the breaking of tailings particles.The internal friction angle of tailings in the low stress stage could be obtained by the linear Mohr-Coulomb criterion,and the internal friction angle of tailings in the high stress stage could be obtained by the power function Mohr strength criterion.A set of dam stability analysis methods considering the tailings strength reduction under high stress conditions was proposed for practical engineering reference.

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备注/Memo

备注/Memo:
收稿日期： 2022-01-14
* 基金项目： 国家重点研发计划项目(2017YFC0804600)
作者简介： 杨春和，博士，中国工程院院士，研究员，主要研究方向为尾矿坝灾变机制与防控技术。
通信作者： 张超，博士，研究员，主要研究方向为尾矿坝灾变机制与防控技术。
更新日期/Last Update: 2022-03-18