倾斜基底内排土场边坡稳定性分析
|
摘要
研究倾斜基底对边坡稳定性的影响,以受到芦子沟背斜构造影响的安太堡露天矿内排土场边坡为研究对象,基于刚体极限平衡法,分析了在1 420 m排弃标高下,平盘宽度分别为60、70和80 m时以200 m为步距向东推进到不同工程位置的边坡稳定性,并得出其变化规律。根据强度折减理论,使用FLAC3D对倾斜基底的内排土场边坡进行数值模拟,确定了以背斜构造为基底的内排土场边坡的滑坡模式。研究表明:安太堡露天矿内排土场边坡受到倾斜基底的影响,其稳定性随平盘宽度的增加呈近线性增加,随工程位置的东移呈现出先减小再增大之后趋于稳定的规律。排弃标高为1 420 m时,内排土场能安全通过背斜区域的平盘宽度为80 m;内排土场边坡的滑坡模式为以危险圆弧为侧界面、以基底为底界面的切层—顺层滑动,背斜构造导致的倾斜基底是边坡稳定性的控制因素。
The influence of inclining basement on slope stability is studied,and the slope stability in different engineering position was analyzed when the project was moved eastward with step distance of 200 m at the elevation of 1 420 m and at different plates width of 60 m,70 m,and 80 m based on the rigid body limit equilibrium method under the background of the inner dumping slope affected by Luzigou anticline of Antaibao open-pit mine.The change regularity is concluded.According to the strength reduction theory,the slope of the inner dumping site with inclining basement is numerically simulated by using FLAC3D software,and the landslide model of the inner dumping slope with anticline basement is determined.It is showed that affected by the anticline basement,the slope stability of the inner dumping site of Antaibao open-pit mine present a nearly linear increasing trend with the increase of the width of the flat and a stable trend after first decreasing and then increasing with the project position moving eastward.The plate width which ensures that inner dumping site is safe in the anticlinal region is 80 m at the elevation of 1 420 m.The landslide model of the slope of the inner dumping site is the cutting-bedding sliding with the failure surface based on the dangerous arc as the side interface and the bedding of the basement as the bottom interface,and the inclining basement caused by the anticline structure is the controlling factor of the slope stability.
The influence of inclining basement on slope stability is studied,and the slope stability in different engineering position was analyzed when the project was moved eastward with step distance of 200 m at the elevation of 1 420 m and at different plates width of 60 m,70 m,and 80 m based on the rigid body limit equilibrium method under the background of the inner dumping slope affected by Luzigou anticline of Antaibao open-pit mine.The change regularity is concluded.According to the strength reduction theory,the slope of the inner dumping site with inclining basement is numerically simulated by using FLAC3D software,and the landslide model of the inner dumping slope with anticline basement is determined.It is showed that affected by the anticline basement,the slope stability of the inner dumping site of Antaibao open-pit mine present a nearly linear increasing trend with the increase of the width of the flat and a stable trend after first decreasing and then increasing with the project position moving eastward.The plate width which ensures that inner dumping site is safe in the anticlinal region is 80 m at the elevation of 1 420 m.The landslide model of the slope of the inner dumping site is the cutting-bedding sliding with the failure surface based on the dangerous arc as the side interface and the bedding of the basement as the bottom interface,and the inclining basement caused by the anticline structure is the controlling factor of the slope stability.
引文
[1]杨天鸿,张锋春,于庆磊,等.露天矿高陡边坡稳定性研究现状及发展趋势[J].岩土力学,2011(5):1437-1451.Yang Tianhong,Zhang Fengchun,Yu Qinglei,et al.Research situation of open-pit mining high and steep slope stability and its developing trend[J].Rock and Soil Mechanics,2011(5):1437-1451.
[2]陈祖煜,弥宏亮,汪小刚.边坡稳定三维分析的极限平衡方法[J].岩土工程学报,2001,23(5):525-529.Chen Zuyu,Mi Hongliang,Wang Xiaogang.A three-dimensional limit equilibrium method for slope stability analysis[J].Chinese Journal of Geotechnical Engineering,2001,23(5):525-529.
[3]朱大勇,钱七虎,周早生,等.岩体边坡临界滑动场计算方法及其在露天矿边坡设计中的应用[J].岩石力学与工程学报,1999(5):567-572.Zhu Dayong,Qian Qihu,Zhou Zaosheng,et al.Technique for computing critical slip field of rock slope and its application to design open pit slope[J].Chinese Journal of Rock Mechanics and Engineering,1999(5):567-572.
[4]曹兰柱,李广贺,王东.露天矿土-岩复合逆倾边坡空间形态优化[J].金属矿山,2016(9):49-52.Cao Lanzhu,Li Guanghe,Wang Dong.Space shape optimization of the soil-rock composite reverse dip slope in open-pit mine[J].Metal Mine,,2016(9):49-52.
[5]王胜.顺倾层状边坡稳定性分析与优化设计[J].煤矿安全,2016(4):229-231.Wang Sheng.Stability analysis and optimization design for down dip bedded slope[J].Safety in Coal Mines,2016(4):229-231.
[6]张信,殷志祥,王东.顺兴露天矿顺倾软弱基底内排土场稳定性研究[J].世界科技研究与发展,2015(2):138-140.Zhang Xin,Yin Zhixiang,Wang Dong.Researches on slope stability of soft and inclined basement inner dump in Shunxing Surface Mine[J].World Sci-Tech R&D,2015(2):138-140.
[7]陈立云.倾斜基底排土场稳定性预测与失稳机制探讨——以胜利煤田西二号露天煤矿排土场为例[J].中国煤炭地质,2016(3):50-55.Chen Liyun.Stability prediction and instability mechanism investigation for sloping basement dump-A case study of W2 surface coal mine dump,Shengli Coalfield[J].Coal Geology of China,2016(3):50-55.
[8]宋子岭,王向磊,杨添,等.端帮压帮的陡边坡开采技术分析[J].金属矿山,2017(3):40-44.Song Ziling,Wang Xianglei,Yang Tian,et al.Analysis on the mining technology of steep slope under the burying slope of the end slope[J].Metal Mine,2017(3):40-44.
[9]崔中良,张东方,姚艳领.极限平衡法在边坡稳定性分析中的应用[J].中国锰业,2016(5):12-15.Cui Zhongliang,Zhang Dongfang,Yao Yanling.Application of the limit equilibrium method in slope stability analysis[J].China's Manganese Industry,2016(5):12-15.
[10]刘波,韩彦辉.FLAC3D原理实例与应用指南[M].北京:人民交通出版社,2006.Liu Bo,Han Yanhui.FLAC3DPrinciple,Instance and Application Guide[M].Beijing:China Communication Press,2006.
[11]沈金瑞,林杭.多组节理边坡稳定性FLAC3D数值分析[J].中国安全科学学报,2007(1):29-33.Shen Jinrui,Lin Hang.Numerical analysis on the stability of slope with several sets of joints by FLAC3D[J].China Safety Science Journal,2007(1):29-33.
[2]陈祖煜,弥宏亮,汪小刚.边坡稳定三维分析的极限平衡方法[J].岩土工程学报,2001,23(5):525-529.Chen Zuyu,Mi Hongliang,Wang Xiaogang.A three-dimensional limit equilibrium method for slope stability analysis[J].Chinese Journal of Geotechnical Engineering,2001,23(5):525-529.
[3]朱大勇,钱七虎,周早生,等.岩体边坡临界滑动场计算方法及其在露天矿边坡设计中的应用[J].岩石力学与工程学报,1999(5):567-572.Zhu Dayong,Qian Qihu,Zhou Zaosheng,et al.Technique for computing critical slip field of rock slope and its application to design open pit slope[J].Chinese Journal of Rock Mechanics and Engineering,1999(5):567-572.
[4]曹兰柱,李广贺,王东.露天矿土-岩复合逆倾边坡空间形态优化[J].金属矿山,2016(9):49-52.Cao Lanzhu,Li Guanghe,Wang Dong.Space shape optimization of the soil-rock composite reverse dip slope in open-pit mine[J].Metal Mine,,2016(9):49-52.
[5]王胜.顺倾层状边坡稳定性分析与优化设计[J].煤矿安全,2016(4):229-231.Wang Sheng.Stability analysis and optimization design for down dip bedded slope[J].Safety in Coal Mines,2016(4):229-231.
[6]张信,殷志祥,王东.顺兴露天矿顺倾软弱基底内排土场稳定性研究[J].世界科技研究与发展,2015(2):138-140.Zhang Xin,Yin Zhixiang,Wang Dong.Researches on slope stability of soft and inclined basement inner dump in Shunxing Surface Mine[J].World Sci-Tech R&D,2015(2):138-140.
[7]陈立云.倾斜基底排土场稳定性预测与失稳机制探讨——以胜利煤田西二号露天煤矿排土场为例[J].中国煤炭地质,2016(3):50-55.Chen Liyun.Stability prediction and instability mechanism investigation for sloping basement dump-A case study of W2 surface coal mine dump,Shengli Coalfield[J].Coal Geology of China,2016(3):50-55.
[8]宋子岭,王向磊,杨添,等.端帮压帮的陡边坡开采技术分析[J].金属矿山,2017(3):40-44.Song Ziling,Wang Xianglei,Yang Tian,et al.Analysis on the mining technology of steep slope under the burying slope of the end slope[J].Metal Mine,2017(3):40-44.
[9]崔中良,张东方,姚艳领.极限平衡法在边坡稳定性分析中的应用[J].中国锰业,2016(5):12-15.Cui Zhongliang,Zhang Dongfang,Yao Yanling.Application of the limit equilibrium method in slope stability analysis[J].China's Manganese Industry,2016(5):12-15.
[10]刘波,韩彦辉.FLAC3D原理实例与应用指南[M].北京:人民交通出版社,2006.Liu Bo,Han Yanhui.FLAC3DPrinciple,Instance and Application Guide[M].Beijing:China Communication Press,2006.
[11]沈金瑞,林杭.多组节理边坡稳定性FLAC3D数值分析[J].中国安全科学学报,2007(1):29-33.Shen Jinrui,Lin Hang.Numerical analysis on the stability of slope with several sets of joints by FLAC3D[J].China Safety Science Journal,2007(1):29-33.