基于GIS的含水层富水性评价及分区

Water-richness Evaluation and Zoning Method of Aquifer Based on GIS

含水层富水性是划分煤矿水文地质类型的主要依据之一,以祁东煤矿为例,选取含水层有效厚度、构造发育密度、钻孔冲洗液消耗量、渗透系数及单位涌水量五个主控因素,引入模糊层次分析法的方法,计算每个主控因素的影响权重;应用ArcGIS的空间分析功能,科学评价含水层富水性,将研究区内含水层分为富水性极弱区、富水性弱区、富水性中等区及富水性强区,为科学合理制定煤矿水害防治方案提供了基础资料和参考依据。

Water yield property of aquifer is one of the main bases for classification of hydrogeological types of coal mines In this paper, Qidong coal mine was taken as an example, and five main controlling factors were selected: the effective thickness of the aquifers, the density of structural development, the consumption of drilling fluid, the permeability coefficient and the unit water inflow;the influence weight of each main controlling factor was calculated using fuzzy analytic hierarchy process;water yield property of aquifer was scientifically evaluated and the aquifers in the study area was divided into extreme low water-richness area, low water-richness area, medium water-richness area and high water-richness area by applying the spatial analysis function of ArcGIS. This study provides a basis and reference for scientific and rational evaluation of water yield property of regional aquifers.