基于溶蚀实验的微观岩溶形态分形特征和水化学动力学特征研究

Fractal and Hydro-Chemical Characteristics of Microscopic Karst Morphology Based on Dissolution Experiments

为有效防治长大岩溶隧道涌水、突泥等地质灾害问题,有必要深入开展岩溶发育规律及岩溶溶蚀作用机理研究。文章在前人研究成果的基础上通过自主研发实验装置,开展了不同工况下溶蚀磨片的溶蚀实验。在对溶蚀实验结果进行初步分析的基础上,借助分形理论开展溶蚀磨片的微观岩溶分形特征分析,借助水化学动力学理论开展溶蚀液的水化学动力学参数和水化学分形特征研究,进一步探索岩溶形态分形特征与水化学动力学特征二者之间的相关性。研究表明,溶蚀实验水化学分形评价指数与微观岩溶分形指数之间的相关性总体上是显著的,为深入认识岩溶地下水作用机理、开展岩溶发育程度评价技术奠定了实验和理论基础。

In order to effectively prevent and control the geological hazards of water inflow and mud bursts in large and long karst tunnels, it is necessary to study the karst development law and the karst dissolution mechanism. Based on the existing research achievements, experimental devices are developed independently, and dissolution experiments are conducted for different working conditions. Based on a preliminary analysis of the results of the dissolution experiments, the micro-karst fractal characteristics are analyzed by fractal theory, and the hydro-chemical dynamic parameters and the hydro-chemical fractal characteristics of the solution are studied by hydro-chemical dynamic theory. The correlation between the fractal characteristics of karst morphology and the hydro-chemical dy- namic characteristics is further explored. The study shows that the correlation between the hydrochemical-fractal evaluation index and the micro-karst fractal index is significant, which lays an experimental and theoretical foundation for understanding the karst groundwater mechanism and performing in-depth research on karst development evaluation techniques.