以下为句子列表：
英文: Abstract: Taking the underground powerhouse in a huge hydropower station as an example,the authors studied distribution pattern of the secondary stress field of surrounding rock mass with nonlinear finite element method of the large-spaned underground pow
中文: 文摘:以某大型水利工程拟建地下厂房为典型实例，应用二维非线性有限元分析方法，研究大跨度、高边墙地下厂房区二次应力场分布规律，并评价围岩的稳定性。
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英文: Based on the simplified structure of rock mass, FLAC(superscript 3D) numerical modeling technique is used to systematically analyze the distribution features of the secondary stress field, strain field and plastic zones in the surrounding rock mass of the
中文: 摘要在岩体结构模型概化的基础上，采用FLAC(上标3D)数值分析方法，系统研究了澜沧江某大型水电站大跨度、高边墙地下洞室群开挖完成后围岩的二次应力场、变形场和塑性破坏区的变化特征。
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