岩土力学 ›› 2020, Vol. 41 ›› Issue (11): 3777-3788.doi: 10.16285/j.rsm.2020.0735

• 岩土工程研究 • 上一篇    下一篇

宽级配废石的高排土场稳定性研究

艾啸韬1, 2，王光进1, 2, 3, 4，张超3，胡斌5，刘文连6，马洪岭3，崔博1, 2   

  1. 1. 昆明理工大学 国土资源工程学院，云南 昆明 650093； 2. 昆明理工大学 金属矿尾矿资源绿色综合利用国家地方联合工程研究中心，云南 昆明 650093； 3. 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； 4. 云南省中-德蓝色矿山与特殊地下空间开发利用重点实验室，云南 昆明 650093；5. 武汉科技大学 资源与环境工程学院，湖北 武汉 430081； 6. 中国有色金属工业昆明勘察设计研究院有限公司，云南 昆明 650051
  • 收稿日期:2020-05-30 修回日期:2020-07-13 出版日期:2020-11-11 发布日期:2020-12-25
  • 通讯作者: 王光进，男，1982年生，博士(后)，教授，博士生导师，主要从事矿山岩土边坡及其灾害防控方面的教学与研究工作。E-mail：wangguangjin2005@163.com E-mail:aixiaotao2018@yeah.net
  • 作者简介:艾啸韬，男，1996年生，硕士研究生，主要从事矿山岩土灾害防控方面的研究工作。
  • 基金资助:
    国家重点研发计划项目（No. 2017YFC0804600）；国家自然科学基金（No. U1802243，No. 41672317）；岩土力学与工程国家重点实验室开放基金课题（No. Z018017）。

Stability analysis of high dump with wide graded waste rock

AI Xiao-tao1, 2, WANG Guang-jin1, 2, 3, 4, ZHANG Chao3, HU Bin5, LIU Wen-lian6, MA Hong-lin3, CUI Bo1, 2   

  1. 1. Faculty of Land Resources Engineering, Kunming University of Science and Technology, Kunming, Yunnan 650093, China; 2. National and Local Joint Engineering Research Center for Green Comprehensive Utilization of Metal Ore Tailings Resources, Kunming University of Science and Technology, Kunming, Yunnan 650093, China; 3. State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan, Hubei 430071, China; 4. Yunnan Key Laboratory of Sino-German Blue Mining and Utilization of Special Underground Space, Kunming, Yunnan 650093, China; 5. School of Resources and Environmental Engineering, Wuhan University of Science and Technology, Wuhan, Hubei 430081, China; 6. Kunming Prospecting Design Institute of China Nonferrous Metal Industry Co., Ltd., Kunming, Yunnan 650051, China
  • Received:2020-05-30 Revised:2020-07-13 Online:2020-11-11 Published:2020-12-25
  • Supported by:
    This work was supported by the National Key Research and Development Program of China(2017YFC0804600), the National Natural Science Foundation of China(U1802243, 41672317) and the Open Fund Project of the State Key Laboratory of Geomechanics and Geotechnical Engineering(Z018017).

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摘要： 宽级配废石的一坡到底的高台阶排土场具有明显的粒径分级特征，传统稳定性分析方法将其简化为多层各向同性的均质土体，却实质性忽略了排土场粗粒土各粒组分布的不均匀性和随机性，导致难以获得其边坡稳定性的合理结论。依托江西某铜矿高台阶排土场，借助自编元胞自动机程序EPOHHM，采用5组窄级配粗粒土表征了高台阶排土场的粒径分级现象，模拟了各粒组散体分布的不均匀性和随机性，分析了不同工况下排土场的位移场及塑性状态，系统地探讨了不同堆排模式下排土场边坡的安全稳定性，提出了一种宽级配废石的高台阶排土场稳定性的精细化分析方法。研究结果表明，排土场发生“拉-剪”破坏；土体中上部有圆弧形滑坡趋势，下部变形表现为沉降，顶部平台产生拉剪裂缝。仅考虑散体力学强度时，底部粗颗粒（ 100 mm）含量的增加对排土场起显著的稳固作用，“单台阶全段高”的堆排模式比“全覆盖式多台阶”更有利于宽级配废石的高排土场安全稳定。研究成果将为保证明显粒径分级的排土场的长期安全稳定提供指导，也为今后分析此类工程问题提供借鉴。

关键词: 宽级配废石, 高排土场, 粒径分级, 缩尺效应, 边坡稳定

Abstract: The high-bench dump of wide-graded waste rock formed by slope-to-the-bottom has obvious particle size grading characteristics. Traditional stability analysis methods usually simplify it to multi-layer isotropic homogeneous soil, and substantially ignore the uneven and random distribution of each particle group in the dump. This makes it difficult to obtain a reasonable conclusion about the slope stability. Relying on the high-bench dumping site of a copper mine in Jiangxi, with the help of self-edited cellular automata program EPOHHM, five groups of narrow-graded coarse-grained soils are used to characterize the particle size grading phenomenon of high-bench dump, and to simulate the non-uniformity and randomness of the granular media material in each particle group. The displacement field and plastic state of the dump site under different working conditions are analyzed, and the safety and stability of the dump site slope under different dumping modes are systematically discussed. A detailed analysis method for the stability of a high-step dump with wide-graded waste rock is proposed. The research results show that the “tension-shear” failure occurs in the dump; the middle-upper part of the soil has an arc-shaped landslide trend, the deformation of the lower part manifests as settlement, and the top platform produces tensile and shear cracks. Considering only the mechanical strength of the granular media material, increasing the content of coarse particles(d>100 mm) at the bottom plays a significant role in stabilizing the dump. The "full section height dump of single-step" dumping mode is more conducive to the safety and stability of the high-bench dump with wide graded waste rock than "full overlay dump of multi-step". The research results will provide guidance for ensuring the long-term safety and stability of the dump with obvious particle size grading, and also provide a reference for the future analysis of similar engineering problems.

Key words: wide graded waste rock, high waste dump, particle size grading, scale effect, slope stability

中图分类号: TU 457
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