| 瑞典爱斯泼硬岩实验场地应力研究 |
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| 引用本文： | 苏生瑞,STEPHANSSON Ove,王士天.瑞典爱斯泼硬岩实验场地应力研究[J].工程地质学报(英文版),2001,9(1):100-106. |
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| 作者姓名： | 苏生瑞 STEPHANSSON Ove 王士天 |
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| 作者单位： | 1.成都理工学院工程地质研究所,成都610059; |
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| 基金项目： | 国家留学基金委资助的研究 |
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| 摘 要： | 爱斯泼 (A..sp o..)硬岩实验场 (HRL)是瑞典拟建的永久储放核废料的场地。实测地应力结果表明, 应力的大小和方位变化较为复杂。通过初步分析认为, 场地附近地应力的变化与断裂构造的发育有关。应用离散元方法, 分别选择平面模型和剖面模型模拟了应力场。模拟结果表明, 地应力的量值和方位在断裂附近均发生明显变化, 且与实测结果较吻合。主应力在断裂附近发生不同程度的偏转, 偏转的幅度与断裂走向和区域应力方向之间的夹角有关。应力的量值在断裂附近也有明显变化。在剖面模型中, 较缓倾角断裂模型的模拟结果最接近实测结果。文中还探讨了断裂带法向刚度和切向刚度的计算方法。
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| 关 键 词： | 地应力 断裂带 爱斯泼硬岩实验场(HRL) 离散元模拟 |
| 收稿时间： | 2000-08-25 |
| 修稿时间： | 2000年8月25日 |
STUDY ON ROCK STRESS OF THE A..SPO.. HARD ROCK LABORATORY SWEDEN |
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| STEPHANSSON Ove.STUDY ON ROCK STRESS OF THE A..SPO.. HARD ROCK LABORATORY SWEDEN[J].Journal of Engineering Geology,2001,9(1):100-106. |
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| Authors: | STEPHANSSON Ove |
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| Institution: | 1.Chengdu University of Technology, Chengdu 610059;2.Chang′an University, Xi′an 710054;3.Royal Institute of Technology, Stockholm Sweden 10044 |
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| Abstract: | A .. sp o .. Hard Rock Laboratoty is a planned permanent repository for nuclear waste in Sweden. In situ stress measurement result indicates that both magnitude and orientation of stress vary greatly. It is thought that these variations are related to the development of fractures. Using diserete element method and UDEC code, the autors simulated the stress field in A .. sp o .. area. The simulation considered both plane model and vertical model. The results show that both magnitude and orientation of stress change in the vicinity of fractured zones and coincide well with the measured result. Principal stress reorientes near fractured zone and the reoriented angle depends on the angle between fractured zone and the direction of boundary stress. For the vertical model, the result from lower angle model is similar to the measured result. An approach to determining normal stiffness and shear stiffness of fracture zone is also discussed in the paper. |
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