Abstract: 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.

Key words: blasting in reservoir area, concrete face rockfill dam, finite element dynamic analysis, blast- ing safety

摘要： 水利水电工程建设中，库区料场开采通常涉及爆破作业，可能对大坝结构安全构成威胁。为保障大坝安全，以白仙山面板堆石坝为研究对象，探讨库区爆破对大坝结构的影响，旨在为同类工程的安全评估提供依据，并优化爆破施工方案。本研究构建了面板堆石坝的三维有限元模型，结合不同施工期的坝高和面板浇筑进度，进行了三维有限元非线性动力分析，评估了爆破振动对大坝填筑期与完建期的结构安全影响，并分析大坝能够承受的爆破强度。研究表明，库区爆破对大坝的振动影响有限，变形量保持在安全范围内。根据分析结果，提出了合理的爆破控制要求，有效保障了大坝结构的稳定性与安全性，为类似工程提供了参考。

关键词: 库区爆破, 面板堆石坝, 有限元动力分析, 爆破安全