安康水电站坝址区地质构造极复杂,断裂发育,坝基千枚岩强度很低。在勘测阶段通过岸边平洞、大口径钻孔,以及河床右部50多个钻孔电视检查中发现了大量的缓倾角断裂结构,随后在边坡及河床大导墙坝段开挖中揭露出边坡及河床左侧有延伸近100m含泥的缓倾角断层。通过坝基平洞及勘探竖井的补勘工 The geological structure of the dam site area of ​​the Ankang Hydropower Station is extremely complicated and fractured. The strength of the phyllite in the dam foundation is very low. A large number of gently-inclined fracture structures were found in more than 50 borehole television inspections conducted during the survey stage through bank holes, large-diameter boreholes, and the right bank of the riverbed. Later on, Out of the slope and the left of the riverbed there is a gentle dip fault that extends nearly 100m in mud. Through the foundation of flat-ditch and exploration of the shaft of the prospector