ANALYSIS OF A HYDROPOWER STATION DAM ON BASALT CONFINED WATER CHARACTERISTICS AND INFLUENCE

A power plant in basalt complex geological conditions, exploration and development of the right to expose the bed on the right bank of confined water. Research shows that the fractured basalt aquifer system with the inhomogeneity, anisotropy and multi-level characteristics. In this paper, the method of evaluating the permeability of rock mass is given based on the fracture characteristics and permeability coefficient. According to the burial conditions, the chemical composition of the water can be divided into upper and lower water pressure of confined water, respectively. The distribution characteristics of confined water level and discharge, the dynamic characteristics of confined water, water chemistry characteristics, storage environment characteristics, supply, runoff and discharge characteristics are discussed, analyzed the influence of confined water on the dam, take targeted treatment measures based on the analysis results, achieved good results.