彬长矿区“对滑型”黄土滑坡及其形成机制

发布时间：2018-05-05 15:33

本文选题：巨厚黄土层 + 采煤沉陷　；参考：《煤炭学报》2017年11期

【摘要】：近年来由于煤炭资源的高强度开采,黄土沟壑区因采煤沉陷引发的沟谷"对滑型"滑坡发育,且滑坡规模大,稳定性差。以李前—白厢滑坡为例,在现场调查的基础上,采用数值模拟分析的方法,探讨了"对滑型"黄土滑坡的形成机制,总结了"对滑型"滑坡的形成条件。研究结果表明:在工作面跨沟回采过程中,上方黄土层指向采空区中心的位移向量与采煤扰动作用下沿坡体倾斜的位移向量产生动态叠加,导致"对滑型"滑坡的发生,且回采后到达一侧的坡体往往早于先到达一侧坡体滑坡;坡向与回采方向相同的一侧,滑坡类型为推移式,坡向与回采方向相反的一侧,滑坡类型为牵引式,且推移式滑坡规模往往大于牵引式滑坡。"对滑型"滑坡的形成需要具备4个主要条件:黄土坡体、沟谷地貌、采矿扰动、降雨催化。
[Abstract]:In recent years, because of the high intensity mining of coal resources, the gully landslide caused by coal mining subsidence in the loess gully area has developed, and the landslide scale is large and the stability is poor. Taking Li Qian-Baixiang landslide as an example, on the basis of field investigation, the forming mechanism of "opposite slip" loess landslide is discussed by using numerical simulation analysis method, and the forming conditions of "opposite slide" landslide are summarized. The results show that the dynamic superposition of the displacement vector pointing to the center of the gob in the upper loess layer and the inclined displacement vector along the slope under the action of coal mining disturbance results in the occurrence of the "opposite slip" landslide. The slope body reached one side earlier than the first, the slope direction is the same as the mining direction, the landslide type is the displacement type, the slope direction is opposite to the mining direction, the landslide type is the traction type. And the scale of the bedded landslide is often larger than that of the traction landslide. " There are four main conditions for the formation of sliding landslide: loess slope, valley geomorphology, mining disturbance and rainfall catalysis.
【作者单位】：矿山地质灾害成灾机理与防控重点实验室;陕西省地质环境监测总站;西安科技大学地质与环境学院;
【基金】：国家重点基础研究发展计划(973)资助项目(2013CB227901)
【分类号】：P642.22;TD824

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