Study on the mechanism of the deep fractures of the left abutment slope at the Jinping first stage hydropower station

s:The paper comprehensively studies distribution of the fractures as well as their deformation features, and then analyses the factors influencing their distribution and deformation feature by geology,mechanics as well as numerical simulation.Thereafter,the paper concludes that deep fractures were the result of release of high geostatic stress including body stress and tectonic stress.