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抚顺西露天矿弱层强度衰减特性及边坡滑移大变形规律

陶泽 孙闯 金淳哲 刘晓龙 李东

陶泽,孙闯,金淳哲,等. 抚顺西露天矿弱层强度衰减特性及边坡滑移大变形规律[J]. 中国地质灾害与防治学报,2023,34(3): 1-9 doi: 10.16031/j.cnki.issn.1003-8035.202205016
引用本文: 陶泽,孙闯,金淳哲,等. 抚顺西露天矿弱层强度衰减特性及边坡滑移大变形规律[J]. 中国地质灾害与防治学报,2023,34(3): 1-9 doi: 10.16031/j.cnki.issn.1003-8035.202205016
TAO Ze,SUN Chuang,JIN Chunzhe,et al. Characteristics of strength reduction in the weak layer and large-slip displacement of the cut slope on the Fushun west open-pit mining area[J]. The Chinese Journal of Geological Hazard and Control,2023,34(3): 1-9 doi: 10.16031/j.cnki.issn.1003-8035.202205016
Citation: TAO Ze,SUN Chuang,JIN Chunzhe,et al. Characteristics of strength reduction in the weak layer and large-slip displacement of the cut slope on the Fushun west open-pit mining area[J]. The Chinese Journal of Geological Hazard and Control,2023,34(3): 1-9 doi: 10.16031/j.cnki.issn.1003-8035.202205016

抚顺西露天矿弱层强度衰减特性及边坡滑移大变形规律

doi: 10.16031/j.cnki.issn.1003-8035.202205016
基金项目: 国家重点研发计划项目(2017YFC1503101)
详细信息
    作者简介:

    陶泽:陶 泽(1996-),男,硕士,主要从事岩土力学数值模拟方面的研究工作。E-mail:2627137567@qq.com

    通讯作者:

    孙 闯(1983-),男,博士,教授,主要从事岩石力学试验与数值计算方面的研究工作。E-mail:sunchuang88@163.com

  • 中图分类号: P642.22

Characteristics of strength reduction in the weak layer and large-slip displacement of the cut slope on the Fushun west open-pit mining area

  • 摘要: 软弱夹层的强度衰减特性是顺层岩质边坡失稳的关键因素之一。选取抚顺西露天矿南帮边坡为研究对象,通过UDEC数值模拟方法,结合离散元理论,建立南帮顺层边坡二维离散元模型,开展南帮边坡弱层强度衰减特性及滑坡大变形规律研究。通过不同围压下的三轴试验,拟合得到弱层残余强度随时间衰减曲线,并通过FISH语言实现数值计算过程中弱层强度随拟合方程进行衰减。数值模拟结果表明:坡脚处最先产生变形,随着开挖的不断进行,弱层强度逐渐衰减,坡顶后缘被拉裂,原有应力平衡被破坏,滑坡体沿弱层产生滑动。通过建立回填数值模型进行边坡稳定性得知,采取压脚回填100 m以后,边坡稳定系数得到了明显的提高,边坡处于基本稳定状态。
  • 图  1  抚顺西露天矿全景图

    Figure  1.  Aerial panoramic view of Fushun west open-pit mine

    图  2  GDS高精度软岩流变仪

    Figure  2.  GDS high precision soft rock rheometer

    图  3  千台山滑坡裂缝

    Figure  3.  Development of landslide cracks in Qiantai Mountain

    图  4  岩石试样

    Figure  4.  Rock samples

    图  5  常规三轴压缩试验破坏岩样

    Figure  5.  Damaged rock samples in conventional triaxial compression test

    图  6  不同围压下应力应变曲线

    Figure  6.  Stress-strain relationship curves under different confining pressures

    图  7  峰值强度与残余强度拟合曲线

    Figure  7.  Fitting curve of peak and residual intensities

    图  8  岩石峰后变形简化曲线

    Figure  8.  Simplified curve of post-peak deformation of rocks

    图  9  E400剖面数值模型

    Figure  9.  Numerical Model of cross-section diagram for E400 Section

    图  10  各级开挖变形图

    Figure  10.  Deformation diagram for each level of excavation

    图  11  南帮回填数值模型

    Figure  11.  Numerical model of cross-section diagram for Nanbang backfilling

    图  12  南帮回填位移图

    Figure  12.  Displacement diagram of Nanbang backfill

    表  1  弱层强度拟合参数

    Table  1.   Fitting parameters for weak layer strength

    目标参数abcR2
    残余强度0.157360.814460.69310.99969
    峰值强度0.170030.347144.895170.99155
    下载: 导出CSV

    表  2  岩体力学参数

    Table  2.   Summary table of rock mechanical parameters

    岩性密度
    /(kg.m−3
    弹性模量
    /GPa
    泊松比
    抗剪断强度
    内摩擦角黏聚力/MPa
    玄武岩280070.14420.3
    花岗片麻岩280080.2450.4
    弱层23000.10.416.90.075
    煤层13001.20.24350.14
    油母页岩23003.40.26350.2
    断层23000.10.416.90.075
    杂填土18000.10.4180.1
    凝灰岩260080.25390.25
    下载: 导出CSV

    表  3  节理力学参数

    Table  3.   Summary table of joint mechanical parameters

    岩性刚度参数抗剪断强度
    法向刚度
    /(GP·am−1
    切向刚度
    /(GPa·m−1
    节理面摩擦角
    节理面黏聚力
    /kPa
    玄武岩3.333.332590
    花岗片麻岩5.935.9345150
    弱层1.811.812010
    煤层2.432.432540
    油母页岩2.772.772540
    断层1.811.812010
    凝灰岩3.673.6728100
    下载: 导出CSV

    表  4  滑坡稳定状态划分

    Table  4.   Division of landslide stable state

    滑坡稳定系数F<1.001.00≤F<1.051.05≤F<1.15F≥1.15
    滑坡稳定状态不稳定欠稳定基本稳定稳定
    下载: 导出CSV
  • [1] 邹宗兴,唐辉明,熊承仁,等. 大型顺层岩质滑坡渐进破坏地质力学模型与稳定性分析[J]. 岩石力学与工程学报,2012,31(11):2222 − 2231. [ZOU Zongxing,TANG Huiming,XIONG Chengren,et al. Geomechanical model of progressive failure for large consequent bedding rockslide and its stability analysis[J]. Chinese Journal of Rock Mechanics and Engineering,2012,31(11):2222 − 2231. (in Chinese with English abstract)
    [2] 张泽林,王涛,吴树仁,等. 泥岩中软弱夹层的剪切力学特性研究[J]. 岩石力学与工程学报,2021,40(4):713 − 724. [ZHANG Zelin,WANG Tao,WU Shuren,et al. Study on shear mechanical properties of mudstone with weak intercalation[J]. Chinese Journal of Rock Mechanics and Engineering,2021,40(4):713 − 724. (in Chinese with English abstract)
    [3] SLOAN S W. Geotechnical stability analysis[J]. Géotechnique,2013,63(7):531 − 571.
    [4] 孔祥曌,李滨,贺凯,等. 柱状岩体崩塌动力特征与破碎规律—以重庆甑子岩崩塌为例[J]. 中国地质灾害与防治学报,2022,33(5):1 − 10. [KONG Xiangzhao, LI Bin, HE Kai, et al. Dynamic characteristics and fragmentation evolution of columnar rockfall: A case study of the Zengziyan rockfall in Chongqing, China[J]. The Chinese Journal of Geological Hazard and Control,2022,33(5):1 − 10. (in Chinese with English abstract)
    [5] 张家勇,邹银先,杨大山. 基于PFC3D的鱼鳅坡滑坡运动过程分析[J]. 中国地质灾害与防治学报,2021,32(4):33 − 39. [ZHANG Jiayong,ZOU Yinxian,YANG Dashan. Analysis of Yuqiupo landslide motion process based on PFC3D[J]. The Chinese Journal of Geological Hazard and Control,2021,32(4):33 − 39. (in Chinese with English abstract)
    [6] 成浩,韩培锋,苏有文. 含石量和坡度对土石混合体崩塌运动规律的影响[J]. 中国地质灾害与防治学报,2020,31(4):11 − 23. [CHENG Hao,HAN Peifeng,SU Youwen. Influence of rock content and slope on collapse in soil-rock accumulation[J]. The Chinese Journal of Geological Hazard and Control,2020,31(4):11 − 23. (in Chinese with English abstract)
    [7] 宋子岭,杨添,赵立春. 含多层软弱夹层的顺向岩质边坡稳定性评价方法对比分析[J]. 中国地质灾害与防治学报,2016,27(2):20 − 25. [SONG Ziling,YANG Tian,ZHAO Lichun. Applicatyion of combination algorithm in stability analysis of rock slope with contains multilayer weak bedrock layers[J]. The Chinese Journal of Geological Hazard and Control,2016,27(2):20 − 25. (in Chinese with English abstract)
    [8] XUE Demin,LI Tianbin,ZHANG Shuai,et al. Failure mechanism and stabilization of a basalt rock slide with weak layers[J]. Engineering Geology,2018,233:213 − 224. doi: 10.1016/j.enggeo.2017.12.005
    [9] 张社荣,谭尧升,王超,等. 多层软弱夹层边坡岩体破坏机制与稳定性研究[J]. 岩土力学,2014,35(6):1695 − 1702. [ZHANG Sherong,TAN Yaosheng,WANG Chao,et al. Research on deformation failure mechanism and stability of slope rock mass containing multi-weak interlayers[J]. Rock and Soil Mechanics,2014,35(6):1695 − 1702. (in Chinese with English abstract)
    [10] LI Jinglong,ZHANG Bo,SUI Bin. Stability analysis of rock slope with multilayer weak interlayer[J]. Advances in Civil Engineering,2021,2021:1 − 9.
    [11] TAN Xin,REN Yakun,LI Tenglong,et al. In-situ direct shear test and numerical simulation of slate structural planes with thick muddy interlayer along bedding slope[J]. International Journal of Rock Mechanics and Mining Sciences,2021,143:104791. doi: 10.1016/j.ijrmms.2021.104791
    [12] ZHENG Qingsong,LIU Enlong,YU Di,et al. Fatigue and damage properties of non-consecutive jointed mudstone samples subjected to cyclic triaxial loading[J]. Bulletin of Engineering Geology and the Environment,2020,79(5):2467 − 2481. doi: 10.1007/s10064-019-01693-x
    [13] YANG Shengqi,TIAN Wenling,JING Hongwen,et al. Deformation and damage failure behavior of mudstone specimens under single-stage and multi-stage triaxial compression[J]. Rock Mechanics and Rock Engineering,2019,52(3):673 − 689. doi: 10.1007/s00603-018-1622-y
    [14] YANG Bing,HOU Jiangrong,LIU Yifei,et al. Dynamic response and failure characteristics of slope with weak interlayer under action of near-fault ground motion[J]. Shock and Vibration,2021,2021:1 − 18.
    [15] 王来贵,向丽,赵娜,等. 地震作用下顺倾多弱层岩质边坡动力响应[J]. 中国地质灾害与防治学报,2021,32(6):18 − 25. [WANG Laigui,XIANG Li,ZHAO Na,et al. Dynamic response of down-dip multi-weak-layer rock slope under earthquake[J]. The Chinese Journal of Geological Hazard and Control,2021,32(6):18 − 25. (in Chinese with English abstract)
    [16] 李鹏, 苏生瑞, 王闫超, 等. 含软弱层岩质边坡的动力响应研究[J]. 岩土力学, 2013, 34(增刊1): 365-370

    LI Peng, SU Shengrui, WANG Yanchao, et al. Research on dynamic response of rock slope with weak layer[J]. Rock and Soil Mechanics, 2013, 34(Sup 1): 365-370. (in Chinese with English abstract)
    [17] 皮晓清,李亮,唐高朋,等. 基于有限元极限上限法的含软弱夹层边坡稳定性分析[J]. 铁道科学与工程学报,2019,16(2):351 − 358. [PI Xiaoqing,LI Liang,TANG Gaopeng,et al. Stability analysis for soil slopes with weak interlayers using the finite element upper bound limit analysis[J]. Journal of Railway Science and Engineering,2019,16(2):351 − 358. (in Chinese with English abstract)
    [18] 杨令强,练继建,陈祖坪. 软弱夹层的接触问题与强度问题探讨[J]. 水利水电技术,2002,33(6):17 − 19. [YANG Lingqiang,LIAN Jijian,CHEN Zuping. Discussion on contact problem and strength problem of weak interlayer[J]. Water Resources and Hydropower Engineering,2002,33(6):17 − 19. (in Chinese)
    [19] 吕布, 杨之俊, 韦秀东, 等. 坝基不同倾角软弱夹层的破坏模式及D-C模型参数研究[J]. 岩土工程学报, 2019, 41(增刊1): 189 − 192

    LU Bu, YANG Zhijun, WEI Xiudong, et al. Failure modes and constitutive model for weak interlayer of dam foundation with different inclination angles[J]. Chinese Journal of Geotechnical Engineering, 2019, 41(Sup 1): 189 − 192. (in Chinese with English abstract)
    [20] 郑青松,刘恩龙,刘明星. 三轴试验下结构面倾角对制备岩样力学特性的影响[J]. 岩土力学,2019,40(5):1854 − 1861. [ZHENG Qingsong,LIU Enlong,LIU Mingxing. Influence of dip angle of structural planes on mechanical properties of artificial rock samples under triaxial test conditions[J]. Rock and Soil Mechanics,2019,40(5):1854 − 1861. (in Chinese with English abstract)
    [21] 李东. 抚顺西露天矿南帮高陡弱层边坡变形规律研究[D]. 阜新: 辽宁工程技术大学, 2021

    LI Dong. Study on deformation law of high, steep and weak layer slope in the south side of Fushun west open pit mine[D]. Fuxin: Liaoning Technical University, 2021. (in Chinese with English abstract)
    [22] 刘传正,崔原,陈春利,等. 辽宁抚顺西露天矿南帮滑坡成因[J]. 地质通报,2022,41(5):713 − 726. [LIU Chuanzheng,CUI Yuan,CHEN Chunli,et al. Research on the south side landslide at west open-pit coal mine in Fushun City, Liaoning Province of China[J]. Geological Bulletin of China,2022,41(5):713 − 726. (in Chinese with English abstract)
    [23] 孙闯, 张向东, 张涛, 等. 深部大跨度泥质顶板剪切冒落失稳区预测研究[J]. 中国安全生产科学技术, 2016, 12(1): 23 − 27

    SUN Chuang, ZHANG Xiangdong, ZHANG Tao, et al. Prediction on shear caving instability region of deep and large span muddy roof[J]. Journal of Safety Science and Technplogy, 2016, 12(1): 23 − 27. (in Chinese with English abstract)
    [24] 孙闯,张树光,贾宝新,等. 花岗岩峰后力学特性试验与模型研究[J]. 岩土工程学报,2015,37(5):847 − 852. [SUN Chuang,ZHANG Shuguang,JIA Baoxin,et al. Physical and numerical model tests on post-peak mechanical properties of granite[J]. Chinese Journal of Geotechnical Engineering,2015,37(5):847 − 852. (in Chinese with English abstract)
    [25] 中华人民共和国国家质量监督检验检疫总局, 中国国家标准化管理委员会. 滑坡防治工程勘查规范GB/T 32864-2016[S], 2016.

    General Administration of Quality Supervision, Inspection and Quarantine of the People’s Republic of China, Standardization Administration of China.Specification of geological investigation for landslide stabilization GB/T 32864-2016[S], 2016. (in Chinese)
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  • 收稿日期:  2022-05-13
  • 修回日期:  2022-07-23
  • 网络出版日期:  2023-04-26

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