丁集煤矿开采对地表水系影响的模拟分析

摘要

According to the engineering background of Dingji Coal Mine, this paper predicted the mining subsidence from 2014 to 2035. Based on ArcGIS, original surface topography in 2014 was considered into the simulation of surface subsidence after mining, and DEM were contracted both in 2014 and 2035. Then, surface streams and their features in 2014 and 2035 were extracted and analyzed respectively using the hydrology analysis module . According to the comparison, the underground mining resulted in big changes of topography which affected flow direction and total stream length in different levels. The number of main streams decreased. The length of longest stream reduced. The direction of one stream even reversed. The catchment basin also combined, extended or shrunk, which would alter original special distribution of water catchment.%选择淮南矿业丁集煤矿为例，预测了研究区自2014年到2035年的采煤沉陷情况，并将原始地形纳入到地表沉陷分析中，从而构建了两个时期的地表 DEM。在此基础上利用ArcGIS软件的Hydrology功能模块，分别模拟分析了2014年和2035年的地表水系及其特征。通过对比发现：由于地下煤炭资源的开采导致地形变化，从而影响地表单元栅格的水流方向、各级别水系的水流总长度，主要地表水系条数减少，最长水系的长度缩短，其中一条水系的整体汇流方向甚至发生了反转，流域盆地更是发生了合并、扩张或缩小，进而改变了原有汇水空间格局。这些研究分析将为未来区域水系规划、土地利用规划和土地复垦方案提供重要的参考。