地下采煤情况下地表黄土边坡稳定性分析  

Stability analysis of a loess slope with underground coal mining

作　　者：马宗源 焦贝[2] 党发宁 成玉祥[3] MA Zongyuan;JIAO Bei;DANG Faning;CHENG Yuxiang(Guizhou Communications Polytechnic,Guiyang 551400,Guizhou,China;Institute of Geotechnical Engineering,Xi'an University of Technology,Xi'an 710048,Shaanxi,China;School of Geological Engineering and Geomatics,Chang an University,Xi'an 710054,Shaanxi,China)

机构地区：[1]贵州交通职业技术学院,贵州贵阳551400 [2]西安理工大学岩土工程研究所,陕西西安710048 [3]长安大学地质工程与测绘学院,陕西西安710054

出　　处：《地震工程学报》2022年第5期1017-1023,共7页China Earthquake Engineering Journal

基　　金：国家自然科学基金项目(51979225);中央高校基本科研业务费专项资金项目(300102268202)。

摘　　要：针对近年来我国西北黄土地区地下采煤诱发地表变形,从而导致地表黄土边坡失稳及滑坡问题,使用显式有限元、动力学大变形计算方法以及土动力学基本理论进行分析研究,并提出一种适用于地下动态扰动对地表边坡稳定性影响的分析方法。通过计算分析得知,地下采煤对地表边坡稳定性的影响是一个动态的过程,所提方法具有较高的计算效率,且能够分析边坡的渐进破坏过程。In recent years,the surface deformation induced by underground coal mining in the loess region of Northwest China has led to frequent instability of surface loess slopes and landslides.On the basis of the explicit finite element method,dynamic large deformation calculation method,and the basic theory of soil dynamics,this paper analyzed the instability of a loess slope induced by underground coal mining and presented an analysis method suitable for the influence of underground dynamic disturbance on the stability of the surface slope.Calculation results show that the influence of underground coal mining on slope stability is a dynamic process.The proposed method has high computational efficiency and can be used to analyze the progressive failure process of the slope.

关 键 词：地下采煤 开采扰动 显式有限元 黄土边坡 稳定性分析 

分 类 号：TU43[建筑科学—岩土工程]