In construction of water conservancy and hydropower projects

blasting operations are often involved in the excavation of reservoir area quarries

which may pose a threat to dam safety. This study fo- cuses on Baixianshan concrete face rockfill dam to investigate the impact of blasting on dam structure safety

aiming to provide a basis for safety assessments of similar projects and optimize blasting operation plans. A three-dimensional finite element model of the concrete face rockfill dam is constructed. Consid - ering different dam heights and face slab casting progress during the construction period

the three-di- mensional nonlinear dynamic finite element analysis is performed to evaluate the impact of blasting vibra - tions on dam during both filling and completion stages

and to analyze the blasting intensity that the dam can withstand. The results indicate that the impact of blasting vibrations on dam is limited

with deforma- tion remaining within safe limits. Based on the analysis

appropriate blasting control measures are pro- posed to ensure the stability and safety of dam structures

providing reference for similar projects.