【摘要】 地下实验室在高放废物处置库选址和确定过程中，起到了承上启下、不可或缺的作用。结合地下实验室所处北山地区的区域地震地质环境，开展高放废物处置地下实验室结构稳定性评价研究。经过十余年的场址稳定性评价工作，建立了地壳稳定区弱活动断裂的活动性鉴定和发震能力评价技术；综合考虑震源-传播路径-局部场地特性的设防地震动的确定方法；提出了大埋深复杂地下实验室系统高效高精度的整体时域分析方法；建立了岩体-结构数值分析模型，揭示其抗震性能及其对地下实验室结构稳定性的影响特征和规律。研究成果确定地下实验室的抗震设防烈度等级，提供关键的结构设计地震动输入参数，给出地下实验室的岩体-结构地震动响应结果，为下一步构建场址描述模型（Site descriptive model,SDM）和进行处置库场址适应性评价提供了支持。更多还原

【Abstract】 Underground Research Laboratories(URLs) play a crucial role in the siting process of high-level radioactive waste disposal. A study of evaluating the structural stability of Beishan URLs site was carried out,considering regional seismic and geological environment. After over a decade of site stability evaluations,techniques were developed to identify weakly active faults in stable crustal areas and assess their seismic potential. A method for determining design seismic motions was proposed, accounting for the source,propagation path, and local site characteristics. An efficient, high-precision time-domain analysis method for deeply buried, complex URL systems was proposed, along with a rock-structure numerical model to reveal seismic performance and its impact on the structural stability of the Beishan URL. The research determined the seismic fortification intensity for the Beishan URL,provided key seismic input parameters for structural design,and presented the seismic response results, supporting the construction of a site descriptive model(SDM) and site suitability assessment for the disposal repository.更多还原