露井联采逆倾边坡破坏模式及稳定性评价方法研究
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摘要
首先分析了单一露天开采逆倾边坡的变形破坏模式、地下开采覆岩变形破坏机理和露井联采逆倾边坡的变形机理,在此基础上,对露井联采逆倾边坡的破坏模式及稳定性定量评价方法进行了研究。研究表明,露井联采逆倾边坡的破坏模式可分为3种类型:滑移型破坏、塌陷型破坏和滑移-塌陷复合型破坏,地下开采的空间位置对边坡的破坏模式及稳定性影响显著,其影响程度受进入塌陷范围内的边坡潜在滑面长度和岩体强度参数弱化程度的控制,据此提出了露井联采逆倾边坡稳定性的极限平衡法,并结合工程实例进行了数值模拟验证。
How to demonstrate the deformation and failure mode of the slope under combine surface and underground mining and evaluate its stability scientifically is one of the problems that need urgent solutions in mining engineering.First,the deformation and failure mode of the slope under simple surface mining,the deformation and failure mechanism of the overlying strata affected by underground mining and deformation mechanism of the slope under combined surface and underground mining were analyzed,then the failure mode and the stability calculation method of the slope under combined surface and underground mining was studied.It can be shown that the failure modes of the slope under combined surface and underground mining involve three patterns: slipping failure,subsiding failure and slipping-subsiding combined failure,that the failure modes and the stability of the slope under combined surface and underground mining be significantly affected by the underground mining positions and the influence be mainly controlled by the length of the latent slide plane of the slope and the weakening degree of the rock masses in the subsidence range.Finally,a limit equilibrium method to calculate the slope stability under combined surface and underground mining was put forward.Finally,it was proved by the numerical simulation of a project case.
How to demonstrate the deformation and failure mode of the slope under combine surface and underground mining and evaluate its stability scientifically is one of the problems that need urgent solutions in mining engineering.First,the deformation and failure mode of the slope under simple surface mining,the deformation and failure mechanism of the overlying strata affected by underground mining and deformation mechanism of the slope under combined surface and underground mining were analyzed,then the failure mode and the stability calculation method of the slope under combined surface and underground mining was studied.It can be shown that the failure modes of the slope under combined surface and underground mining involve three patterns: slipping failure,subsiding failure and slipping-subsiding combined failure,that the failure modes and the stability of the slope under combined surface and underground mining be significantly affected by the underground mining positions and the influence be mainly controlled by the length of the latent slide plane of the slope and the weakening degree of the rock masses in the subsidence range.Finally,a limit equilibrium method to calculate the slope stability under combined surface and underground mining was put forward.Finally,it was proved by the numerical simulation of a project case.
引文
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[14]石杰红,王金安,谢芳.高陡边坡下开采安全性的相似材料模拟与数值模拟对比研究[J].中国安全生产科学技术,2007,3(6):76-81.SHI Jiehong,WANG Jinan,XIE Fang.Study on theSecurity of the Excavation Under the Slope with BothSimilar Material and Numerical Simulation[J].Journal ofSafety Science and Technology,2007,3(6):76-81.
[15]孙世国,冉启发,李国柱.边坡工程的复合开挖效应及其评价方法的研究[C].第二届全国岩土与工程学术大会论文集,2006:822-826.SUN Shiguo,RANG Qifa,LI Guozhu.The compositeeffect of excavation slope engineering and its evluationmethod research[M].The Second Session of theNational Soil and Engineering Conference Papers,2000:53-59.
[16]孙世国,著.矿山复合开采边坡岩体变形规律[M].北京:地震出版社,2000:8-10.SUN Shiguo,et al.Rock movement laws of slope undercombined surface mining and underground mining[M].Seimological Press,2000:8-10.
[2]邢利伟.露井联合开采的边坡稳定性研究[D].湖北:武汉理工大学图书馆,2007:3-5.XING Liwei.Slope stability analysis of open-pit withunderground mining[D].Hubei:Wuhan University ofTechnology,2007.
[3]王东,曹兰柱,宋子岭.基于RFPA-SRM的露井联采边坡稳定性研究[J].合肥工业大学学报,2009,32(10):1562-1565.WANG Dong,CAO Lanzhu,SONG Ziling.Study onslope stability with combine mining based on RFPA-SRM[J].Journal of Hefei University of Technology,2009,32(10):1562-1565.
[4]黄平路,陈从新.露天和地下联合开采引起矿山岩层移动规律的数值模拟研究[J].岩石力学与工程学报,2007,26(S2):4037-4043.HUANG Pinglu,CHEN Congxin.Numerical simulationreseach on rock movement caused by surface mining andunderground mining[J].Chinese Journal of RockMechanics and Engineering,2007,26(S2):4037-4043.
[5]韩放,谢芳,王金安.露天转地下开采岩体稳定性三维数值模拟[J].北京科技大学学报,2006,28(6):510-514.HAN Fang,XIE Fang,WANG Jin’an.3-D numericalsimulation on the stability of rocks in transferredunderground mining from open-pit[J].Journal ofUniversity of Science and Technology Beijing,2006,28(6):510-514.
[6]郑友毅.露井联采边坡稳定性数值模拟[J].辽宁工程技术大学学报,2009,8(28):533-536.ZHENG Youyi.Numerical simulation of slope stabilityunder combined mining[J].Journal of LiaoningTechnical University,2009,8(28):533-536.
[7]孙世国,崔恒忠,冉启发,等.岩石工程开挖对山坡体应力场扰动规律的数值分析[J].地球与环境,2005,33(3):107-111.SUN Shiguo,CUI Hengzhong,RAN Qifa,et al.Numerical analysis of disturbation law for stress field inhillside excavated by rock engineering[J].Earth andEnvironment,2005,33(3):107-111.
[8]蓝航.基于FLAC3D的边坡单元安全度分析及应用[J].中国矿业大学学报,2008,37(4):570-574.LAN Hang.Analysis of zone safety degree of slopes andits application based on FLAC3D[J].Journal of ChinaUniversity of Mining&Technology,2008,37(4):570-574.
[9]LUO Yizhong,WU Aixiang,LIU Xiangping.Stability andreliability of pit slopes in surface mining combined withunderground mining in Tonglushan mine[J].J.Cent.South Univ.Technol,2004,11(4):434-439.
[10]吴剑平,朱建明,成新元.露井联采下边界参数优化的相似模拟研究[J].中国矿业,2008,17(9):79-82.WU Jianping,ZHU Jianming,CHENG Xinyuan.Similarsimulation research on optimization of boundary parameterunder the condition of open-underground mining[J].China Mining Magazine,2008,17(9):79-82.
[11]朱建明,刘宪权,吴剑平.露井联采下边坡稳定性的相似模拟研究[J].工程地质学报,2009,17(2):206-211.ZHU Jianming,LIU Xianquan,WU Jianping.SimilaritySimulation on Slope Stability under Condition of CombinedOpen and Underground Mining[J].Journal ofEngineering Geology,2009,17(2):206-211.
[12]孙世国,蔡美峰,王思敬.复合开采引起地面长期剧烈变形的几点认识[J].岩土工程学报,2000,22(1):136-138.SUN Shiguo,CAI Meifeng,WANG Sijing.Problem ofLongterm Acute Deformation on Surface Induced byCombined Excavation on Mine—a Case of Study[J].Chinese Journal of Geotechnical Engineering,2000,22(1):136-138.
[13]陈先平.露天与井工联合开采影响下的边坡变形监测[J].资源环境与工程,2006,20(63):709-712.CHEN Xianping.Monitoring of Slope Deformation inCombination Mining of Open Pit and Ground[J].Resources Environment&Engineering,2006,20(63):709-712.
[14]石杰红,王金安,谢芳.高陡边坡下开采安全性的相似材料模拟与数值模拟对比研究[J].中国安全生产科学技术,2007,3(6):76-81.SHI Jiehong,WANG Jinan,XIE Fang.Study on theSecurity of the Excavation Under the Slope with BothSimilar Material and Numerical Simulation[J].Journal ofSafety Science and Technology,2007,3(6):76-81.
[15]孙世国,冉启发,李国柱.边坡工程的复合开挖效应及其评价方法的研究[C].第二届全国岩土与工程学术大会论文集,2006:822-826.SUN Shiguo,RANG Qifa,LI Guozhu.The compositeeffect of excavation slope engineering and its evluationmethod research[M].The Second Session of theNational Soil and Engineering Conference Papers,2000:53-59.
[16]孙世国,著.矿山复合开采边坡岩体变形规律[M].北京:地震出版社,2000:8-10.SUN Shiguo,et al.Rock movement laws of slope undercombined surface mining and underground mining[M].Seimological Press,2000:8-10.
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