东江水电站大坝是目前国内在建的最高的混凝土双曲拱坝。由于坝高、库大、结构复杂,对坝基(花岗岩)开挖质量要求严格,为确保工程质量,中南勘测设计院曾建议在开挖中采用预裂爆破技术。为此,东江工程指挥部在学习葛洲坝工程软岩预裂爆破施工经验的基础上,邀请并组织有关单位从19 Dongjiang Hydropower Station dam is currently the highest under construction in the concrete double-arch dam. Due to the high dam height, large reservoir structure and complex structure, the quality of excavation of dam foundation (granite) is strict. To ensure the project quality, Zhongnan Investigation and Design Institute has proposed the use of presplitting blasting technology in excavation. To this end, Dongjiang Engineering Headquarters Gezhouba learning soft pre-cracking blasting construction experience, based on the invitation and organization of the units from 19