›› 2009, Vol. 30 ›› Issue (12): 3553-3561.

• Fundamental Theroy and Experimental Research •     Next Articles

Stability and chain destruction analysis of underground energy storage cluster based on deformation reinforcement theory

YANG Qiang1, LIU Yao-ru1, LENG Kuang-dai1, LÜ Qing-chao1, YANG Chun-he2   

  1. 1. State Key Laboratory of Hydroscience and Engineering, Tsinghua University, Beijing 100084, China; 2. Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan 430071, China
  • Received:2009-08-16 Online:2009-12-10 Published:2010-01-18

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Abstract:

The stability analysis method of underground energy storage cluster is developed using the principle of minimum plastic complementary energy and unbalanced force, based on the strict definition of structure failure and its logical description with set concept presented in deformation reinforcement theory. In the framework of non-equilibrium elastoplastic mechanics, the classic finite element method is extended to the analysis for post-failure state of structure, where the plastic complementary energy norm serves as the criterion of global stability while the unbalanced force and its development indicates the pattern and path of destruction. The cluster stability and chain destruction of double-cavern cluster under different distances are emphatically studied. Results of stability analysis and chain destruction simulation for Jintan oil and gas storage cluster in rock salt deposit is presented. The result shows that the unbalanced force and plastic complementary energy are suitable for quantitatively evaluating the stability of underground storage cluster. Deformation reinforcement theory provides quantitative and practical analysis method for the study of global stability, cavern interaction and space-time evolution of destruction of underground energy storage cluster; and it which can be used for the research of disaster mechanism and protection measures.

Key words: storage cluster stability, chain destruction, deformation reinforcement, plastic complementary energy, unbalanced force

CLC Number: 

  • TE 122.2
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