| 基于COMSOL的地下水封油库围岩流固耦合特征模拟研究 |
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| 引用本文： | 张彬, 李卫明, 封帆, 吴兵, 曹小亮. 2012: 基于COMSOL的地下水封油库围岩流固耦合特征模拟研究. 工程地质学报, 20(5): 789-795. |
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| 作者姓名： | 张彬 李卫明 封帆 吴兵 曹小亮 |
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| 作者单位： | 1.中国地质大学北京工程技术学院 北京 100083 |
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| 基金项目： | 国家自然科学基金项目(40902086);水利部岩土力学工程重点实验室开放基金项目(G07-08)和中央高校基本科研业务经费项目(2010ZY14)资助 |
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| 摘 要： | 地下水封油库通常建造于完整性好的结晶岩体内部,利用隙存水封的原理将油气封闭于地下洞室内部,洞库围岩在施工及运营期间具有典型的流固耦合特征。论文基于裂隙岩体流固耦合理论,采用COMSOL Multiphysics 软件对洞库围岩不同工况下流固耦合特征进行了模拟研究。研究结果表明:地下洞库在不设置人工水幕情况下,开挖后洞室顶部地下水位明显下降,并形成降落漏斗,可能导致洞室油气外溢; 设置人工水幕后,洞室顶部地下水位下降趋势得到明显控制,有效确保了水封的可靠性; 在设置水幕的情况下,洞室直墙及洞室拱顶与底板角点处出现明显的应力集中,但围岩仍未出现连贯塑性区,洞室最大位移不超过5mm,洞室围岩稳定性良好。分析成果对于指导洞库优化设计及施工具有一定的参考价值。
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| 关 键 词： | 地下水封油库 流固耦合 COMSOL Mutiphysics软件 渗流场 应力场 |
| 收稿时间： | 2012-05-20 |
| 修稿时间： | 2012-06-28 |
NUMERICAL SSIMULATION FOR FLUID-SOLID COUPLING CHARATERISTICS IN SURROUNDING ROCK OF UNDERGROUND WATER-SEALED OIL STORAGE BASED |
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| ZHANG Bin, LI Weiming, FENG Fan, WU Bing, CAO Xiaoliang. 2012: NUMERICAL SSIMULATION FOR FLUID-SOLID COUPLING CHARATERISTICS IN SURROUNDING ROCK OF UNDERGROUND WATER-SEALED OIL STORAGE BASED. JOURNAL OF ENGINEERING GEOLOGY, 20(5): 789-795. |
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| Authors: | ZHANG Bin LI Weiming FENG Fan WU Bing CAO Xiaoliang |
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| Affiliation: | 1.China University of GeosciencesBeijing, School of Engineering & Technology, Beijing 100083 |
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| Abstract: | Underground water-sealed oil storage is usually built in integral crystalline rock masses. Based on the theory of water sealing, oil is stored in underground cavern. In the surrounding rock, typical fluid-solid coupling characteristics exist in the process of construction and running. Based on flow-solid coupling theory of fractured rock mass, COMSOL Multiphysics software is used to simulate the fluid-structure interaction of surrounding rock under different working conditions. Research results show the follows. Without setting water curtains the underground water level at top of the cavern decreases obviously and forms the funnel, which could lead the spill of oil and gas. After the water curtains are set, the fall trend of water level is effectively controlled and the sealing of cavern is ensured. With setting water curtains, obvious stress concentration appears in straight wall, vault and the corner points of floor. But the plastic zone still does not appear in surrounding rock. The maximum displacement of cavern does not exceed 1mm. Besides, the stability of surrounding rock is good. The results can serve as references to the design and construction of underground engineering. |
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| Keywords: | Underground water-sealed oil storage Fluid-solid coupling COMSOL Multiphysics software Seepage field Stress field |
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