| 采坑型滑坡地质力学模式研究--以贵州省福泉滑坡为例 |
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| 引用本文： | 王小明,史文兵,梁风,马文鹏.采坑型滑坡地质力学模式研究--以贵州省福泉滑坡为例[J].防灾减灾学报,2020(1):13-19. |
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| 作者姓名： | 王小明 史文兵 梁风 马文鹏 |
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| 作者单位： | 贵州大学国土资源部喀斯特环境与地质灾害重点实验室;贵州大学资源与环境工程学院;兰州大学土木工程学院 |
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| 基金项目： | 贵州大学引进人才科研项目(贵大人基合字(2017)77号);贵州省科技厅科技平台及人才团队计划(黔科合平台人才[2017]5402号);贵州省教育厅青年科技人才成长项目(黔教合KY字[2018]117号)资助。 |
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| 摘 要： | 福泉滑坡具有顺倾上硬下软的结构特征,采用颗粒流离散元模拟采动滑坡的变形破坏全过程,研究福泉滑坡在露天开采条件下变形破坏的地质力学模式。基于颗粒流离散元程序,引入平行粘结模型,通过参数标定确定细观参数与宏观力学性质的关系,据此建立斜坡模型,模拟斜坡采动过程中的变形破坏全过程,确定该类采动滑坡形成的地质力学模式;研究滑坡滑动过程中的速度和能量变化以及堆积特征。研究表明:斜坡采动过程中,潜在滑面顺层滑移,后缘拉裂,裂纹从下往上向软弱面拓展,前缘坡脚处岩体形成锁固段,斜坡出现由前缘至后缘缘递减的蠕滑变形,随着斜坡进一步采动,锁固段发生剪切破坏,前缘坡体启动,中后部裂缝贯通—滑移,斜坡整体失稳破坏,形成牵引式采动滑坡,该类滑坡形成的地质力学模式可分为:滑移—拉裂—剪断3个阶段;对滑坡运动过程的模拟可知,采坑积水是小坝组受灾的关键转化因子。
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| 关 键 词： | 采动滑坡 地质力学模式 滑坡运动过程 灾害转化因子 |
Study on the Geomechanical Model of Mining-pit Landslide——A Case Study of Fuquan Landslide in Guizhou Province |
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| WANG Xiao-ming,SHI Wen-bing,LIANG Feng,MA Wen-peng.Study on the Geomechanical Model of Mining-pit Landslide——A Case Study of Fuquan Landslide in Guizhou Province[J].Seismological Research of Northeast China,2020(1):13-19. |
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| Authors: | WANG Xiao-ming SHI Wen-bing LIANG Feng MA Wen-peng |
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| Institution: | (Key Laboratory of Karst Environment and Geological Disasters,Ministry of Land and Resources,Guizhou University,Guizhou Guiyang 550025,China;College of Resources and Environmental Engineering,Guizhou University,Guizhou Guiyang 550025,China;College of Civil Engineering,Lanzhou University,Gansu Lanzhou 730000,China) |
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| Abstract: | Fuquan landslide has the structural characteristics of upper hard and lower soft inclination,The whole process of deformation and failure of mining landslide is simulated by particle flow discrete element,and the geomechanical model of deformation and failure of Fuquan landslide under the condition of open-pit mining is studied.Based on the discrete element program of particle flow,a parallel bond model was used to determine the relationship between mesoscopic parameters and macroscopic mechanical properties through parameter calibration.Based on this,a slope model was established to simulate the whole process of deformation and failure in the mining process of slope,and set the geomechanical model of such mining landslide.The variation of velocity and energy and the accumulation characteristics of landslide are studied.Research shows that the slope mining process,the potential sliding surface of bedding sliding,the trailing edge cracking and crack from down to up to the weak plane is extended,frontal formation locked segment of rock mass slope foot,slope appeared by diminishing leading edge to trailing edge of the creep deformation,along with further mining slope,the locked segment of shear failure occurs,leading edge slope starts,in the back of the fracture penetration-slip,instability and failure of slope as a whole,traction type mining landslide formation,geological mechanics model of this kind of landslide formation can be divided into:glide,cracking-cut three stages;It can be seen from the simulation of landslide movement process that the water collected in the pit is the key transforming factor of Xiaoba formation disaster. |
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| Keywords: | mining landslide geomechanical model landslide movement process disaster transforming factor |
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