›› 2010, Vol. 31 ›› Issue (12): 3984-3990.

• Numerical Analysis • Previous Articles     Next Articles

Inversion analysis of initial stress field of Dalian underground oil storage cavern

YU Chong1, LI Hai-bo1, LI Guo-wen2, LIU Ya-qun1   

  1. 1. State Key Laboratory of Geomechanics and Geotechnical Engnieering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan 430071, China; 2. Daqing Oilfield Engineering Co. Ltd., Daqing, Heilongjiang 163712, China
  • Received:2009-09-21 Online:2010-12-10 Published:2010-12-21

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Abstract:

Initial stress field is the basis of the stability evaluation of underground engineering. In initial stress field analysis of Dalian underground oil storage cavern，based on site stress test data, a new method of inversion of initial stress field is proposed. Firstly，the relationship between initial stress field and elevation is established according to the analysis of measured stresses. Secondary, because the direction of principal stress and model coordinate axis do not coincide, the stress must be transformed. Finally, inversion of initial stress field is completed with functions using the Hoek-Brown rock mass strength criterion. The functions are defined with the programming language FISH embedded within FLAC3D. Through the comparison between calculated stresses and measured stresses, it is shown that the proposed method has higher inversion precision, smaller error and meets the needs of engineering, which reveals that it is a practical, simple and effective method.

Key words: initial stress field, inversion analysis, oil storage, FLAC3D

CLC Number: 

  • TU 452
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