广西合山煤矿疏干岩溶水渗流场分析(附答辩文稿)

摘 要 合山煤田位于广西中部，属我国南方典型的岩溶充水矿床。主采煤层底板与充水岩层直接接触，充水岩层内部连成一体且与外部水力联系密切。随着煤田的规模开采，矿区地下水补径排条件发生了根本的变化。地下水渗流场的改变，加上煤田区特有的水文地质结构特征，使煤矿开采过程中所遭遇的水害问题极其严重。论文在对矿区资料系统研究分析的基础上，查明了矿区的水文地质条件，用Surfer8.0搭建了研究区域的三维空间结构模型，用Modflow3.1建立了煤田区域的水文地质模型。拟合了矿区天然条件下的地下水渗流场，模拟了开采到一定条件下矿区的疏干岩溶水渗流场。在比较分析开采前后矿区渗流场变化后，提出了合理规划开采煤矿，防治井下水害的建议。 关键词：合山煤田 岩溶水 渗流场分析 模拟 Modflow Surfer Analysis of Seepage Field of Drainaged Karst Water in Heshan Coalfield Abstract Heshan coalfield is located in the middle land of Guangxi province. It belong to the typical karst water filling mineral deposit. The bottom of it’s working face contact with the seam inundation directly. The inner part of seam inundation is a whole body and has a close hydraulic relation with external part. As the mine exploited in scale ,The circulation of groundwater has a ultimate alternation. Because of the change in groundwater seepage filed besides the specific hydrogeologic structure of the mine area, Water pouring has became the most difficult problem during the coal exploitation. Based on systematical analysis the data of mine area, this paper established the hydrogeologic condition of the mine area. Created the research area’s three-dimensional space structure model with Surfer8.0.and hydrogeologic model with Modflow3.1.Then fit the mine area’s the seepage field in natural condition. and simulate the drainaged seepage field at certain exploitation level. After comparing and analysing the alteration of coalfield’s seepage field. This paper presents a conclusion and recommendations of proper exploit the coalfield and prevent the water pouring in the mine. Keywords: Heshan coalfield Karst water Modflow Surfer Analysis of seepage field simulation