郭捷, 马凤山, 武拴军, 范永亮, 张超, 顾金钟. 2018: 陡倾矿体开采断层滑移引发覆岩失稳机理分析. 工程地质学报, 26(s1): 704-709. DOI: 10.13544/j.cnki.jeg.2018249
    引用本文: 郭捷, 马凤山, 武拴军, 范永亮, 张超, 顾金钟. 2018: 陡倾矿体开采断层滑移引发覆岩失稳机理分析. 工程地质学报, 26(s1): 704-709. DOI: 10.13544/j.cnki.jeg.2018249
    GUO Jie, MA Fengshan, WU Shuanjun, FAN Yongliang, ZHANG Chao, GU Jinzhong. 2018: ANALYSIS ON THE MECHANISM OF OVERBURDEN INSTABILITY CAUSED BY FAULT SLIP OF STEEPLY INCLINED ORE-BODY. JOURNAL OF ENGINEERING GEOLOGY, 26(s1): 704-709. DOI: 10.13544/j.cnki.jeg.2018249
    Citation: GUO Jie, MA Fengshan, WU Shuanjun, FAN Yongliang, ZHANG Chao, GU Jinzhong. 2018: ANALYSIS ON THE MECHANISM OF OVERBURDEN INSTABILITY CAUSED BY FAULT SLIP OF STEEPLY INCLINED ORE-BODY. JOURNAL OF ENGINEERING GEOLOGY, 26(s1): 704-709. DOI: 10.13544/j.cnki.jeg.2018249

    陡倾矿体开采断层滑移引发覆岩失稳机理分析

    ANALYSIS ON THE MECHANISM OF OVERBURDEN INSTABILITY CAUSED BY FAULT SLIP OF STEEPLY INCLINED ORE-BODY

    • 摘要: 断层是成矿构造中重要的边界因素,断层的稳定性对矿体以及上覆岩体的稳定性具有关键的影响。本文基于金川矿区Ⅲ号矿体开采诱发断层滑移导致覆岩失稳的实例,在对地表及井下变形特征调查分析的基础上,采用数值模拟方法对断层滑移过程进行了研究,模拟结果揭示了此次断层滑移过程中断层带应力场、位移场的演化特征。根据应力分布特点将断层失稳过程分为应力缓慢增长阶段、应力增长震荡阶段、应力快速增长阶段、应力峰值震荡阶段、断层初始滑移失稳阶段和断层快速滑移失稳阶段6个阶段。断层失稳滑移过程由变形量积累阶段和断层突然失稳阶段构成,变形量积累阶段又可以分为断层减速滑移、断层稳定滑移和断层加速滑移3个不同时期。

       

      Abstract: The fault is the important boundary factor of the metallogenic structure. Fault stability influence the stability of overlying rock mass and ore-body. The study analyzed the mechanism of fault slip induced by mining in the No. 3 mine zone of the Jinchuan Mine. The fault slip led to the overlying rock mass deformation. This article also studied the process of fault slip based on the characteristics analysis of deformation of surface and underground. The results showed the evolution characteristics of the stress and displacement distribution. The fault slip process was divided into six stages, slowly growth stage, shocking stage, rapidly growth stage, peak value shocking stage, initially slip stage and rapidly slip stage. The evolution law of fault displacement showed the process of fault slide consist of displacement cumulative stage and sliding stage. And the displacement cumulative stage is divided into decelerate slide, stable slide and accelerate slide.

       

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