粒径对尾矿抗剪强度及坝体稳定性影响

张超; 马昌坤; 杨春和; 陈青林; 潘振凯

doi:10.11779/CJGE2019S1037

粒径对尾矿抗剪强度及坝体稳定性影响 English Version

张超^{1, 2},
马昌坤^1,2, ,,
杨春和^{1, 2},
陈青林³,
潘振凯^{1, 2}

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. 中国科学院大学,北京 100049;
3.重庆大学,重庆 400044

基金项目: 国家重点研发计划重点专项（2017YFC0804601）; 国家自然科学基金应急管理项目（51741410）

详细信息

作者简介:
张超(1978—),男,汉,副研究员,主要从事尾矿力学特性与尾矿坝灾变机理研究工作。E-mail:czhang@whrsm.ac.cn。

通讯作者:
马昌坤，E-mail：1044752531@qq.com

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出版历程
- 收稿日期: 2019-04-28
- 发布日期: 2019-07-14

Effects of particle diameter on shear strength of tailings and stability of tailings dams

ZHANG Chao^{1, 2},
MA Chang-kun^1,2, ,,
YANG Chun-he^{1, 2},
CHEN Qing-lin³,
PAN Zhen-kai^{1, 2}

1. State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan 430071, China;
2. University of Chinese Academy of Sciences, Beijing 100049, China;
3. Chongqing University, Chongqing 400044, China

摘要

摘要: 为解决尾砂安全筑坝与井下充填之间的矛盾,开展了粒径对尾矿强度及坝体稳定性影响的研究。试验结果表明：尾砂加权平均粒径随干滩长度增大而下降的速率越来越缓,加权平均粒径与滩长之间关系满足幂函数沉积模型;尾矿内摩擦角随粒料加权平均粒径的减小而减小,当加权平均粒径小于0.05 mm时,内摩擦角显著减小;尾矿坝稳定性随粒料加权平均粒径的减小而降低,当加权平均粒径小于0.05 mm时坝体稳定性显著降低。研究结果为尾砂安全筑坝与井下粗料充填提供可借鉴的界限粒径,对于其它相同类型尾砂安全筑坝同样具有重要参考价值。
- 粒径 /
- 尾矿 /
- 抗剪强度 /
- 尾矿坝 /
- 稳定性
Abstract: In order to solve the contradiction between safety damming and downhole filling of tailings dams, the effects of particle size on tailing strength and dam stability are studied. The tests show that, the weighted average particle size of tailings decreases slowly with the increase of dry beach length, the relationship between the weighted average particle size of tailings and the length of the beach is the power function deposition model. The internal friction angle of tailings decreases with the decrease of the weighted average particle size, and the internal friction angle of tailings decreases significantly when the weighted average particle size is less than 0.05 mm. The stability of tailings dams decreases with the decrease of the weighted average particle size, and the stability of dam decreases significantly when the weighted average particle size is less than 0.05 mm. The results of this study provide a reference for the boundary particle size of tailing sand for safe dam construction and coarse material-filled underground.
- particle diameter /
- tailings /
- shear strength /
- tailings dam /
- stability

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参考文献(6)

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