2400m埋深地下实验室洞群布置模式优化研究

发布时间：2018-06-17 17:13

  本文选题：高地应力 + FLACD　； 参考：《岩土工程学报》2016年S2期

【摘要】：深部地下试验室是未来人类开采深部资源的基础,中国锦屏地下实验室是全世界埋深最深的地下实验室,锦屏地下试验室二期#8实验洞的建设或许涉及极深岩石力学研究方向,故拟在#8实验洞内设计开挖多个实验洞群以开展原位力学测试及原理探索。然而,实验洞群的布置模式直接影响地下实验室的长期稳定特性。针对高地应力赋存环境地下实验洞室群开挖,建立了FLAC3D三维数值模型,对比研究了同侧相邻洞室不同间距和异侧洞室不同布置工况下,后续洞室开挖对已建洞室围岩稳定性的影响,并用位移变化值作为地下洞室群布置工况评价指标,判识开挖对已建洞室的影响程度。结果表明:同侧相邻洞室间距8 m,异侧洞室对称布置为最优布置工况。研究成果可直接指导锦屏地下实验室二期#8实验洞内实验洞群的布置设计,为其他高地应力环境下洞室群布置提供参考。
[Abstract]:The deep underground laboratory is the basis of human exploitation of deep resources in the future. China's Jinping underground laboratory is the deepest underground laboratory in the world. The construction of #8 experimental hole in the second phase of the Jinping underground laboratory may involve the research direction of extremely deep rock mechanics. Therefore, several experimental caverns are designed and excavated in #8 Experimental Cave in order to carry out in situ mechanical testing and principle exploration. However, the layout of experimental caverns directly affects the long-term stability of underground laboratories. A 3D numerical model of FLAC3D is established for excavation of underground experimental caverns in high stress environment. The different spacing of adjacent caverns and different layout of caverns on the same side are compared and studied. The influence of the subsequent excavation on the stability of the surrounding rock of the existing cavern is evaluated by using the displacement variation value as the evaluation index for the working condition of the underground cavern group arrangement and the degree of influence of the excavation on the built cavern is identified. The results show that the spacing of adjacent caverns is 8 m, and the symmetrical arrangement of different caverns is the optimal condition. The research results can directly guide the layout design of experimental caverns in #8 experimental cave in the second phase of Jinping Underground Laboratory and provide reference for the layout of other caverns under high ground stress.
【作者单位】： 四川大学水利水电学院水力学与山区河流开发保护国家重点实验室;
【基金】：四川省科技厅应用基础计划项目(2015JY0045) 国家重点研发项目(2016YFC0600701)
【分类号】：TV223
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本文编号：2031820