黄土丘陵区急倾斜煤层开采引发地面塌陷及地裂缝分析——以甘肃省华亭县某社区地面塌陷为例

Analysis of Surface Collapse and Geofracture Caused by Steep Coal Mining in Loess Hilly Region:Taking the Surface Collapse in a Community in Huating County,Gansu Province as an Example

为分析煤层倾角变动时矿山开采引发的地表变形特征,对研究区急倾斜煤层开采引发的地面塌陷进行调查、分析,在此基础上运用数值模拟软件MSPS对该区矿山开采工作面进行数值模拟,获得了地表下沉等值线图。结果显示,研究区内最大沉降值为2130 mm,而地质模型预测出相同位置的下沉值为2370 mm,二者数据基本吻合。该方法为相似条件下煤层的合理开采和矿区地质环境保护提供了重要的参考依据。

In order to analyze the characteristics of surface deformation caused by mining when the inclination of coal seam changes,based on the investigation and analysis of surface collapse caused by steep coal mining in the research area,the numerical simulation software MSPS was used on the mining working face in the area to obtain the surface subsidence contour map.The results show that the maximum subsidence in the area is 2130 mm,and the predicted value by geological model in the same location is 2370 mm,which are generally consistent.This method provides important reference for reasonable mining of coal seam and protection of geological environment under similar conditions.