Failure Analysis of Overhanging Blocks in the Walls of a Gas Storage Salt Cavern: A Case Study
文献类型：期刊论文
| 作者 | Wang, Tongtao2; Yang, Chunhe2; Li, Jianjun1; Li, Jinlong2; Shi, Xilin2; Ma, Hongling2 |
| 刊名 | ROCK MECHANICS AND ROCK ENGINEERING
 |
| 出版日期 | 2017 |
| 卷号 | 50期号:1页码:125-137 |
| 关键词 | Rock mechanics Rock salt 3D geomechanical model Salt cavern gas storage Numerical simulation |
| ISSN号 | 0723-2632 |
| DOI | 10.1007/s00603-016-1102-1 |
| 英文摘要 | Most of the rock salt of China is bedded, in which non-salt layers and rock salt layers alternate. Due to the poor solubility of the non-salt layers, many blocks overhang on the walls of the caverns used for gas storage, constructed by water leaching. These overhanging blocks may collapse at any time, which may damage the tubing and casing string, and even cause instability of the cavern. They are one of the main factors threatening the safety of caverns excavated in bedded rock salt formations. In this paper, a geomechanical model of the JJKK-D salt cavern, located in Jintan salt district, Jintan city, Jiangsu province, China, is established to evaluate the stability of the overhanging blocks on its walls. The characters of the target formation, property parameters of the rock mass, and actual working conditions are considered in the geomechanical model. An index system composed of stress, displacement, plastic zone, safety factor, and equivalent strain is used to predict the collapse length of the overhanging blocks, the moment the collapse will take place, and the main factors causing the collapse. The sonar survey data of the JJKK-D salt cavern are used to verify the reliability and accuracy of the proposed geomechanical model. The results show that the proposed geomechanical model has a good reliability and accuracy, and can be used for the collapse prediction of the overhanging blocks on the wall of the JJKK-D salt cavern. The collapse length of the overhanging block is about 8 m. We conclude that the collapse takes place during the debrining. The reason behind the collapse is the sudden decrease of the fluid density, leading to the increase of the self-weight of the overhanging blocks. This study provides a basis for the collapse prediction method of the overhanging blocks of Jintan salt cavern gas storage, and can also serve as a reference for salt cavern gas storage with similar conditions to deal with overhanging blocks. |
| WOS研究方向 | Engineering ; Geology |
| 语种 | 英语 |
| WOS记录号 | WOS:000392293300009 |
| 出版者 | SPRINGER WIEN |
| 源URL | [http://119.78.100.198/handle/2S6PX9GI/3978]  |
| 专题 | 岩土力学所知识全产出_期刊论文 国家重点实验室知识产出_期刊论文 |
| 作者单位 | 1.PetroChina Co Ltd, West To East Gas Pipeline Co, Gas Storage Project Dept 2.Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn ; |
| 推荐引用方式 GB/T 7714 | Wang, Tongtao,Yang, Chunhe,Li, Jianjun,et al. Failure Analysis of Overhanging Blocks in the Walls of a Gas Storage Salt Cavern: A Case Study[J]. ROCK MECHANICS AND ROCK ENGINEERING,2017,50(1):125-137. |
| APA | Wang, Tongtao,Yang, Chunhe,Li, Jianjun,Li, Jinlong,Shi, Xilin,&Ma, Hongling.(2017).Failure Analysis of Overhanging Blocks in the Walls of a Gas Storage Salt Cavern: A Case Study.ROCK MECHANICS AND ROCK ENGINEERING,50(1),125-137. |
| MLA | Wang, Tongtao,et al."Failure Analysis of Overhanging Blocks in the Walls of a Gas Storage Salt Cavern: A Case Study".ROCK MECHANICS AND ROCK ENGINEERING 50.1(2017):125-137. |
入库方式： OAI收割
来源：武汉岩土力学研究所
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