基于分形理论的富水性指数法在含水层富水性评价中的应用

Application of Water-rich Index Method Based on Fractal Theory in Water-rich Evaluation of Aquifer

为了提高富水性指数法在复杂构造、低勘探程度矿区含水层富水性评价的可靠性,提出了基于分形理论的富水性指数法评价含水层富水性,给出了评价流程。首先确定影响含水层富水性的主控因素,其中构造因素可以用分形维数代替,利用层次分析法确定各主控因素的权重,借助Arcgis软件,对各主控因素进行叠加获得含水层富水性分区图,并利用实测单位涌水量进行校正。选取准格尔煤田不连沟煤矿为研究对象,开展了砂岩含水层富水性评价应用,研究结果表明:相比传统含水层富水性评价方法,该方法使构造描述要素数量减少2~3项,同时解决了在水文地质勘查程度较低情况下含水层富水性合理准确评价与分区难题。

In order to improve the reliability of water-rich index method in the evaluation of water-rich aquifers in complex structures and low-exploration mining areas,water-rich index method based on fractal theory was proposed to evaluate the waterrich of aquifer.Evaluation process was given.Firstly,the main controlling factors affecting the water-rich of aquifer were determined.The structural factors could be replaced by fractal dimension,and the weight of each main controlling factor was determined by analytic hierarchy process.The main controlling factors were superimposed to obtain the water-rich zoning map of the aquiferby Arcgis,and the measured unit water inflow was used for correction.Taking Buliangou Coal Mine in Jungar Coalfield as the research object,water-rich evaluation of sandstone aquifer was carried out.The results show that compared with the traditional evaluation method,the method can reduce the number of structural description elements by 2-3 items,and solve the problem of reasonable and accurate evaluation and zoning of the water-rich aquifer under the condition of low degree of hydrogeological exploration.