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盐穴储气库破坏后地表沉陷规律数值模拟研究

ISSN号：1000-7598
期刊名称：《岩土力学》
时间：0
分类：TE122[石油与天然气工程—油气勘探]
作者机构：[1]重庆大学西南资源开发及环境灾害控制工程教育部重点实验室,重庆400044, [2]中国科学院武汉岩土力学研究所,武汉430071
相关基金：国家重点基础研究发展规划（973）No.2009CB724606）;国家自然科学基金资助项目（No.50674108）;国家创新研究群体基金（No.50621403）.

关键词：盐穴储气库, 地表沉陷, 破碎岩块, 2D-Sink, salt cavern gas storage, ground subsidence, broken rock, 2D-Sink

中文摘要：

地下盐穴储气库在天然气调峰和保障供气安全上具有不可替代的作用。地下盐穴储气库达到设计年限后,将报废而逐步垮塌,必然引起严重的地表沉陷。因此,对盐穴储气库破坏后地表沉陷规律进行研究具有十分重要的意义。考虑到目前的数值分析软件进行地表沉陷分析的不足,开发了用于盐穴储气库破坏后地表沉陷数值模拟的有限元专用软件—2D-Sink,该软件具有处理破碎岩块的能力。应用2D-Sink对盐穴储气库破坏后引起的地表沉陷规律进行了系统的研究,共建立了6种模型进行数值模拟,分别研究了地表沉陷层理效应、地表沉陷的岩层倾斜效应、地表沉陷的断层效应和多盐穴地表沉陷规律。对多溶腔地表变形曲线与单溶腔叠加的地表变形曲线进行比较,验证了地表沉陷叠加原理的正确性。研究成果为盐穴储气库报废后地表沉陷灾害控制提供了理论基础。

英文摘要：

Salt cavern gas storage plays an irreplaceable role in shaving natural gas peak and ensuring the safety of gas supply. But when the design life of salt caverns gas storage is over, it will be discarded and finally collapse, which would cause serious ground subsidence. R is very important to find the rule of the ground subsidence. Considering the deficiency of the present numerical analysis software in analyzing the ground subsidence, 2D-Sink, the special software which is used in numerical simulation of the ground subsidence after the damage of the salt cavern gas storage has been developed. And the software has the function of dealing with the broken rock. Through operating the 2D-Sink, 6 numerical models are built. The rules of the bedding effect, rock inclined effect; fault effect and ground subsidence of multi-cavern have been studied. To compare the ground subsidence curves of multi-cavern with the superposition ground subsidence curves of single cavern, it is proved that the superposition principle of ground subsidence is correct. The research results can provide one of the basic theories for the control of ground subsidence disaster after the salt cavern gas storages have been discarded

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