›› 2009, Vol. 30 ›› Issue (12): 3615-3620.

• Fundamental Theroy and Experimental Research • Previous Articles     Next Articles

Research on mechanical mechanism of interlayer collapse in solution mining for salt cavern gas storage

SHI Xi-lin1, LI Yin-ping1, YANG Chun-he1, 2, QU Dan-an2, 3, MA Hong-ling1   

  1. 1. State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences,Wuhan 430071, China; 2. Key Laboratory for the Exploitation of Southwest Resources and Environmental Disaster Control Engineering, Ministry of Education, Chongqing University, Chongqing 400030, China; 3.Gas Storage Project Department, West-to-East Gas Pipeline Company, Petro China Company Limited, Jintan 213200, China
  • Received:2008-04-08 Online:2009-12-10 Published:2010-01-18

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Abstract:

The existence of indissolvable interlayers leads to many adverse effects for building salt cavern storages by solution mining. It is an urgent technical problem that how to forecast and control the collapse of indissolvable interlayers. The problem is the research background of mechanism of interlayer collapse. A mechanical model for interlayer collapse study is established and solved by theory of plate and shell. Based on the solution, the mechanisms of collapse caused by partial failure and integral instability are analyzed. And then all the mechanisms of collapse are summarized. Finally, a method for calculating limit diameter of interlayer is proposed. The conclusions of the research have significant meaning for forecasting and controlling interlayer collapse in solution mining.

Key words: rock mechanics, salt rocks, gas storage solution mining, interlayer collapse, mechanical mechanism

CLC Number: 

  • TU 457
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