岩溶水系统溶蚀速度的多重耦合模型——以山西太原东山水文地质系统为例

MULTIPLE COUPLING MODEL FOR DETERMINATION OF CORROSION RATE IN KARST WATER SYSTEM —Case of Hydrogeological System in Taiyuan,Shanxi Example

本文运用化学热力学与水文地质系统耦合理论，将太原东山水文地质系统划分成矿物溶解、沉淀各异的区带；通过各区带内的化学—数学与相关分析法的耦合模型，计算出各区带碳酸、硫酸盐岩的综合溶蚀模量；再将综合溶蚀模量和用化学动力学理论确定地下水实际速度的解析解公式与有限单元法耦合，计算确定出各节点的溶蚀速度。从而不仅有效地评价了水文地质系统内的溶蚀特点，还可反映区内地质构造和水文地质条件，以及含水层在倾向方向随埋深增大呈幂函数变化的规律；进而可确定出区内供水、矿井防治水的最佳勘探地段。这些不仅具有一定理论意义。

Based on coupling theory of chemical thermodynamics and hydrogeology, this paper divides the hydrogeological system of Dongshan, Taiyuan into different zones of mineral dissolution and precipitation. Comprehensive corrosion modulus of carbonate sulphate rocks in each zone have been calculated by using the coupling model combining chemistry mathematics with the method of correlation analysis.Coupling comprehensive corrosion modulus and the analytical solution formula for determining actual rate of groundwater by chemical kinetics with finite element method, we calculate the corrosion rate at each junction point. So this model can not only evaluate the corrosion characteristics of hydrogeological system,but also show the geological structural and hydrogeological conditions in the area and the enlargement regularity of the aquifer with the depth increasment in a power function. According to these, we can determine the optimum prospecting location for water supply and the prevention and treatment of water in mine. These is not only theoretical significence , but also certain social and economic benifits.