露天矿高陡逆倾层状边坡滑移模式与稳定性
详细信息 本馆镜像全文    |  推荐本文 | | 获取馆网全文
摘要
为解决露天矿高陡逆倾层状边坡的稳定性与破坏机理等极为复杂问题,采用以平庄西露天煤矿顶帮边坡为研究对象,以Mohr-Coulomb准则作为边坡失稳判据,应用有限差分软件FLAC3D对露天矿高陡逆倾层状边坡破坏模式与稳定性进行了数值模拟研究,通过分析边坡的应力分布特征、位移分布及其演化过程,确定了边坡的破坏模式与失稳演化机理的方法.研究结果表明:平庄西露天矿顶帮边坡处于稳定状态;滑坡是在拉-剪复合作用下形成的,潜在滑坡模式为以弱层A为底界面的切层-顺层滑动;弱层A附近产生的应力集中是边坡发生剪切破坏的外在因素;沿弱层发生的隆起现象可作为露天矿高陡逆倾层状边坡失稳预警的宏观判据.
When tilted ore body is exploited by surface mining methods,high and steep anti-dip stratified slope is often formed.This is a serious threat to the production safety in surface coal mine and the stability and fracture mechanism of this kind of slope is so complex that it is one of the challenges in mining engineering field.Considering Pingzhuang West Open Top Slope as a study case,using Mohr-Coulomb as a criterion of slope instability and using FLAC3 D to do the numerical simulation research on failure model and stability for opencast high and steep anti-dip stratified slope.The failure mode and instability evolution mechanism are determined by analyzing stress distribution character and displacement distribution and its evolving process in this paper.The results show that the top of West Slope Pingzhuang Surface Coal mine is in a stable state;the landslide is formed under pull-scissors effect,and the potential landslide mode is cut layer-bedding layer sliding with A-weak layer as bottom boundary;stress concentration near A-weak layer is the external factor of the shear failure;Uplift phenomenon occurred along the weak layer can be the macroeconomic warning criterion of high and steep anti-dip stratified slope instability in surface coal mine.
引文
[1]卢世宗.我国矿山边坡研究的基本情况和展望[J].金属矿山,1999,27(9):6-10.Lu Shizong.Basic conditon and prospect of China’s mine slope research[J].Metal Mine,1999,27(9):6-10.
    [2]孙广忠.工程地质与地质工程[M].北京:地震出版社,1993.
    [3]殷跃平.中国典型滑坡[M].北京:中国大地出版社,2007.
    [4]杨天鸿,解连库,王善勇,等.抚顺西露天矿北帮边坡治理工程效果初步评价[J].岩石力学与工程学报,2005,24(11):1 841-1 846.Yang Tianhong,Xie Lianku,Wang Shanyong,et al.Effect evaluation of distortion for north project of side slope in fushun west open cast[J].Chinese Journal of Rock Mechanics and Engineering,2005,24(11):1 841-1 846.
    [5]郑颖人,赵尚毅.有限元强度折减法在土坡与岩坡中的应用[J].岩石力学与工程学报,2004,23(19):3 381-3 388.Zheng Ying-ren,Zhao Shang-yi.Applicetion of strength redouction fem in sold and rock slope[J].Chinese Journalof Rock Mechanics and Engineering,2004,23(19):3 381-3 388.
    [6]王东,曹兰柱,翟栋.露天矿高陡边坡稳定性数值模拟[J].金属矿山,2009(11):120-123.Wang Dong,Cao Lanzhu,Zhai Dong.Numberical simulation on open-pit high and steep slope stability[J].Metal Mine,2009(11):120-123.
    [7]He F W,Zhu M,Liu W S,Liu T L,Wang L H,Wang J S.Slope stability analysis based on finite element method in limestone mine[C].The Computer App;ication and Aystem Modeing,Taiyuan,China,October22-24,2010.
    [8]Lu C W,Lai S C.Application of finite element method for safety factor analysis of slope stability[C].The Consumer Electronics,Communications and Networks,Xian-Ning,China,April,16-18,2011.
    [9]白永健,黄润秋,巨能攀,等.高陡岩质边坡稳定性三维离散元分析[J].工程地质学报,2008,16(5):592-597.Bai Yongjian,Huang Runqiu,Ju Nengpan,et al.3DEC stability analysis of high and steep rock slope[J].Journal of Engineering Geology,2008,16(5):592-597.
    [10]贺续文.基于离散单元法的节理岩体边坡稳定性分析[D].湘潭:湘潭大学,2010.He Xuwen.Numerical analysis of the stability of jointed rock slope based on DEM[D].Xiang Tan:Xiangtan University,2010.
    [11]黄润秋,许强.显示拉格朗日差分分析在岩石边坡工程中的应用[J].岩石力学与工程学报,1995,14(4):346-354.Huang Runqiu,Xu Qiang.Application of explicit lagrangian finite difference method in rock slope engineering[J].Chinese Journal of Rock Mechanics and Engineering,1995,14(4):346-354.
    [12]曹平,张科,汪亦显,等.多层边坡破坏机制数值模拟研究[J].岩土力学,2011,32(3):872-878.Cao Ping.Zhang Ke,Wang Yixian et al.Numerical simulation of fai-lure mechanism of multilayer slope[J].Roch and Siod Mechanics,2011,32(3):872-878.
    [13]郑颖人,陈祖煜,王恭先等.边坡与滑坡工程治理[M].北京:人民交通出版社,2007:40-56.
    [14]杨秀贵,仉淼,冯一鸣.顺层岩质边坡隧道开挖稳定性数值模拟[J].辽宁工程技术大学学报:自然科学版,2013,32(7):880-885.Yang Xiugui,Zhang Miao,Feng Yiming.Numerical simulation and analysis of stabilization on tunnel excavation of bedding rock slope[J].Journal of Liaoning Technical University:Natural Science,2013,32(7):880-885.
    [15]刘向峰,朱建峰,王振伟.黑岱沟露天矿排土场西部变形区滑坡控制[J].辽宁工程技术大学学报:自然科学版,2011,30(3):360-364.Liu Xiang feng,Zhu Jianfeng,Wang Zhenwei.Slope control of Heidaigou open-pit mine dump west deformation area[J].Journal of Liaoning Technical University:Natural Science,2011,30(3):360-364.

版权所有:© 2023 中国地质图书馆 中国地质调查局地学文献中心