山西某煤矿开采地表变形破坏特征分析

Characteristic Analysis of Deformation and Failure on Surface of a Mining Aera in Shanxi Province

河南、山西和西北地区煤层多赋存于山区地表条件下,开采引起的岩层移动不仅与覆岩性质有关,还与地表地形和工作面的组合关系相关。本文以山西某矿31002工作面为研究对象,利用有限元数值模拟方法,对比分析了该工程地质条件下2种典型工况模型和工作面实际走向剖面下山区地表变形破坏特征,总结出最大下沉点偏向覆岩较薄的位置,地势突起的部位水平位移值较大,坡体部位为地质灾害易发区域。

Coal seam is mostly hosted in the mountain area in Henan, Shanxi and northwest China. The strata movement due to mining is connected not only with the overburden properties but also with the combination relationship between the surface configuration and working face. This article takes the 31002 working face of a mine in Shanxi Province as the research object, comparative analyses the surface deformation and failure characteristics between two typical cases on the engineering geological condition and trend profile of 31002 working face by using finite element numerical analysis. The paper points out the maximum subsidence space which is partial to thin overburden position and considers that horizontal displacement is bigger in the hill, so the region in the slope body is easy to occur geological disasters.