东北大学学报（自然科学版）

东北大学学报:自然科学版 ›› 2019, Vol. 40 ›› Issue (2): 273-278.DOI: 10.12068/j.issn.1005-3026.2019.02.023

• 资源与土木工程 • 上一篇    下一篇

诱导冒落法回采挂帮矿引发的边坡失稳

任凤玉1， 谭宝会1， 付煜1， 朱强2   

  1. (1. 东北大学 资源与土木工程学院， 辽宁 沈阳110819; 2. 西南科技大学 环境与资源学院， 四川 绵阳621010)
  • 收稿日期:2017-09-19 修回日期:2017-09-19 出版日期:2019-02-15 发布日期:2019-02-12
  • 通讯作者: 任凤玉
  • 作者简介:任凤玉(1956-)，男，内蒙古赤峰人，东北大学教授，博士生导师.
  • 基金资助:
    国家自然科学基金重点项目(51534003)； 国家重点研发计划项目(2016YFC0801601).

Slope Failure Caused by Hanging-Wall Ores Mining by Induced Caving Method

REN Feng-yu1， TAN Bao-hui1， FU Yu1， ZHU Qiang2   

  1. 1. School of Resources & Civil Engineering， Northeastern University， Shenyang 110819， China; 2. School of Environment & Resources， Southwest University of Science and Technology， Mianyang 621010， China.
  • Received:2017-09-19 Revised:2017-09-19 Online:2019-02-15 Published:2019-02-12
  • Contact: TAN Bao-hui
  • About author:-
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摘要： 在露天转地下过渡期利用诱导冒落法回采挂帮矿时将引发边坡大规模失稳，这将对坑底的露天采矿、露天运输系统以及地表设施和建筑产生威胁.岩体结构对边坡失稳的发展有着关键的控制作用，通过非连续变形分析(DDA)方法研究了不同边坡岩体结构下，采用诱导冒落法回采挂帮矿时引发的边坡失稳过程.通过7组岩体结构各不相同的边坡模型，得到三种边坡失稳模式:滑移失稳、倾倒失稳、复合失稳，不同的边坡失稳模式导致不同的边坡破坏程度及破坏规模.最后以海南铁矿为背景，对诱导冒落法回采挂帮矿引发的边坡失稳过程进行了实例分析，为挂帮矿的开采设计和边坡失稳风险预测及预防提供技术支撑.

关键词: 挂帮矿, 诱导冒落法, 边坡失稳, 岩体结构, 非连续变形分析

Abstract: Induced caving is a new underground mining method， which contributes to the smooth connection of ore production during the transition from open pit to underground. However， large scale of slope failure can be triggered when mining hanging-wall ores by this method， which would pose a threat to the open-pit mining， the open-pit transportation system and the surface infrastructure. The discontinuous geological structure of the rock mass is a key factor for slope stability. In this paper， the discontinuous deformation analysis(DDA)was used to study the slope failure process caused by hanging-wall-ore mining excavated by the induced caving method in different rock mass structures. Three slope failure modes， namely， sliding， toppling and complex failures， were concluded based on seven models with different rock mass structures， leading to different failure modes. A case of slope failure was analyzed based on Hainan iron mine. This study provides some technical supports for mining design of induced caving， as well as risk prediction and prevention of slope failure.

Key words: hanging-wall ore, induced caving method, slope failure, rock mass structure, DDA

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