›› 2007, Vol. 28 ›› Issue (4): 823-826.

• Fundamental Theroy and Experimental Research • Previous Articles     Next Articles

Preliminary theoretical study on impact on coal caused by interactions between CO2 and coal

BAI Bing，LI Xiao-chun，LIU Yan-feng，Fang Zhiming, WANG Wei   

  1. Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan 430071, China
  • Received:2006-01-23 Online:2007-04-10 Published:2013-09-05

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Abstract: Regarding the solid surface energy decrease as a result of adsorption of gas as the reason why the solid skeleton swells. A theoretical formula is given to estimate the swelling stress without displacement constraint, which is an appropriate assumption as the initial underground stress is so large. The swelling stresses caused by CO2 and CH4 respectively are compared. This is helpful in evaluating the mechanical stability in CO2-ECBM. Then another formula is given to evaluate the coal strength decrease caused by the CH4 or CO2 adsorption; the formula is helpful in evaluating the mechanical properties change and the mechanical stability after the adsorption of gases in CO2-ECBM

Key words: CO2-ECBM, adsorption, coal swelling, coal strength

CLC Number: 

  • TU 443
  • Please send e-mail to pingzhou3@126.com if you would like to read full paper in English for free. Parts of our published papers have English translations.
  • Please send e-mail to pingzhou3@126.com if you would like to read full paper in English for free. Parts of our published papers have English translations.
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