拟建中的长江三峡水利枢纽,经三十多年的地质工作,其坝址和库首地段的地质条件基本查清。但近年来有关学者又提出了结晶岩区内的近东西向断裂问题。笔者研究了这些近东西向断裂的规模。性质和活动性,以及三峡库首的水文地质条件后,认为近东西向断裂规模较小,挽近活动性不强,这些断裂的存在并不影响三峡水利枢纽的区域稳定性评价。 The proposed Three Gorges Project, after more than 30 years of geological work, has basically ascertained the geological conditions of its dam site and reservoir head. However, in recent years, scholars have proposed the near east-west fracture in the crystalline rock area. The author studied the scale of these near-east-west faults. Nature and activity of the Three Gorges reservoir and the hydrogeological conditions of the Three Gorges reservoir, it is considered that the scale of the recent east-west fault is small and the activity of the current approach is not strong. The existence of these faults does not affect the regional stability evaluation of the Three Gorges Hydropower Project.