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2012 (Vol. 4, Issue: 20)
Article Information:

Roof Stability Evaluation of Bedded Rock Salt Cavern Used as Underground Gas Storage

Tongtao Wang, Xiangzhen Yan, Xiujuan Yang and Tingting Jiang
Corresponding Author:  Xianyzhen Yan 

Key words:  Bedded rock salt cavern, cusp catastrophe model, merical simulnuation, roof stability, strength reduction, ,
Vol. 4 , (20): 4160-4170
Submitted Accepted Published
April 25, 2012 May 29, 2012 October 15, 2012
Abstract:

The cusp catastrophe model is proposed in the study to evaluate the roof stability factor of natural gas storage cavern in bedded rock salt, which can overcome the shortages of traditional Strength Reduction Finite Element (or difference) Method (SR FEM) that the failure criteria can not be precisely given. The proposed model can greatly improve the calculating precision and has clear physical and mathematical meanings. The numerical simulations of generic natural gas storage caverns in bedded rock salt located in Jiangsu province of China are carried out based on the proposed model to evaluate the stability factor of cavern roof. In addition, parameters are studied to investigate the stability factors as functions of the buried depth, roof span, roof salt thickness and roof salt Young's modulus, overlying nonsalt thickness, overlying non-salt Young's modulus and gas pressure, etc. The examples show that the proposed model is precise and correct, which can meet the actual engineering demands. The stability factor of cavern roof is equidirectional with the increase of roof salt thickness, roof salt stiffness, overlying nonsalt thickness, overlying non-salt stiffness and gas pressure, but reverse to the increase of buried depth and roof span. Our methods provide a new way to evaluate the roof stability factor of natural gas storage cavern in bedded rock salt.
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  Cite this Reference:
Tongtao Wang, Xiangzhen Yan, Xiujuan Yang and Tingting Jiang, 2012. Roof Stability Evaluation of Bedded Rock Salt Cavern Used as Underground Gas Storage .  Research Journal of Applied Sciences, Engineering and Technology, 4(20): 4160-4170.
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ISSN (Online):  2040-7467
ISSN (Print):   2040-7459
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