摘要
为研究上下盘开采对矿山边坡稳定性的影响,基于有限元方法,利用Midas GTS软件建立相应模型,通过分析不同开挖位置、不同断层形态下边坡的力学特征,得出其力学响应机制,主要得到以下结论:断层倾角发生改变时,随着工作面的推进,因上下盘开采而导致的边坡沉陷值整体变化不大,但倾角的增大会导致更易活化;断层倾角发生改变时,上盘最大下沉处位置更靠近断层方向,而下盘最大下沉处位置更靠近采空区方向;上盘开采时,随着断层倾角的增大,开采前后边坡安全系数均出现减小,下盘则与之相反;上盘开采时随着断距的增大,边坡安全系数均出现增大的现象,下盘开采时随着断距的增大,边坡安全系数均出现减小的现象。创新点在于考虑断层对矿山开采过程边坡稳定性的影响,该研究为今后复杂地质条件下矿山开挖所导致的边坡问题提供参考。
In order to study the influence of hanging wall and footwall mining on slope stability,based on the finite element method,this paper uses Midas GTS software to establish the corresponding model.By analyzing the mechanical response mechanism of slope under the same excavation position and different fault forms,the main conclusions are as follows:When the fault dip angle changes,with the advancement of the working face,the hanging wall and footwall mining lead to little change in the subsidence value of the slope,but the increase of the dip angle will lead to easier activation;When the fault dip angle changes,the maximum subsidence position of the hanging wall is closer to the fault direction,while the maximum subsidence position of the footwall is closer to the goaf direction;When the hanging wall is mined,with the increase of fault dip angle,the slope safety factor before and after mining decreases,while the footwall is opposite;When the hanging wall is mined,the slope safety factor increases with the increase of the fault distance.When the footwall is mined,the slope safety factor decreases with the increase of the fault distance.The innovation of this paper is to consider the influence of faults on slope stability during mining.This study provides a reference for slope problems caused by mine excavation under complex geological conditions in the future.
作者
景明
黄亚军
吕志强
徐啸川
JING Ming;HUANG Yajun;LYU Zhiqiang;XU Xiaochuan(China Construction Civil Engineering Co.,Ltd.,Beijing 100070,China;First Engineering Co.,Ltd.,Affiliated to CCCC First Highway Engineering Group,Beijing 102205,China;School of Engineering,China University of Geosciences(Wuhan),Wuhan 430074,China)
出处
《有色金属（矿山部分）》
2023年第5期36-42,51,共8页
NONFERROUS METALS(Mining Section）
基金
国家自然科学基金资助项目(51674099)。
关键词
边坡稳定性
有限元
力学响应机制
断层
slope stability
finite element
mechanical response mechanism
fault
