隔水层控制型边坡失稳机理模拟研究  

Simulation study of destabilization mechanism of water barrier controlled slopes

作　　者：赵梦令 王胆 尚国安 邢克兵 肖建雄 李元浩 ZHAO Mengling;WANG Dan;SHANG Guo′an;XING Kebing;XIAO Jianxiong;LI Yuanhao(Yunnan Xianfeng Coal Industry Development Co.,Ltd.,Kunming 655211,China;Yunnan Coal Industry Group Co.,Ltd.,Kunming 650231,China;North China University of Technology,Beijing 100144,China)

机构地区：[1]云南省煤炭产业集团有限公司,云南昆明650231 [2]云南先锋煤业开发有限公司,云南昆明655211 [3]北方工业大学,北京100144

出　　处：《露天采矿技术》2025年第2期1-6,共6页Opencast Mining Technology

基　　金：国家重点研发计划资助项目(2024YFC3013904)。

摘　　要：为了探究雨季之后先锋露天煤矿北帮边坡由泥岩形成的隔水层在地下水动态变化过程中的破坏机理,基于数形结合的研究方法建立了边坡力学模型,推导了泥岩隔水层在水压作用下的破坏理论,并基于2023年昆明市真实降雨情况进行耦合模拟。结果表明:雨季过后,随着降雨入渗受阻,泥岩上部积水导致水压增大,率先发生塑性破坏,由隔水层向导水层转化;然而边坡并未发生较大的位移变形,仍保持稳定状态;在进入到1月后,地下水位持续抬升,泥岩隔水层上部水压达到极限值,发生塑性破坏,致使其导水,进而发生大范围塑性变形,北帮边坡发生以泥岩为滑动面的滑坡灾害。In order to investigate the damage mechanism of the water barrier formed by mudstone on the north slope of Xianfeng Open-pit Coal Mine after the rainy season in the process of groundwater dynamics,the article establishes a slope mechanics model based on the research method of combining numbers and shapes,and deduces the damage theory of the mudstone water barrier under the action of water pressure,and carries out coupled simulation based on the real rainfall in Kunming City in 2023.The results show that after the rainy season,with the rainfall infiltration is blocked,the mudstone upper water accumulation leads to the increase of water pressure,the first plastic damage occurs,from the water insulation layer to the water conduction layer.However,the slope doesnot occur a large displacement and deformation,and still maintains a stable state.After entering into the month of January,the groundwater level continues to rise,the upper water pressure of the mudstone water insulation layer reaches the limiting value,and the plastic damage occurs,resulting in the conductivity of the water,and then occur in a large range of plastic deformation,the north slope occurs landslide disaster with mudstone as the sliding surface.

关 键 词：露天矿边坡 隔水层 流固耦合 FLAC3D 数值模拟 

分 类 号：TD824.7[矿业工程—煤矿开采]