›› 2009, Vol. 30 ›› Issue (4): 885-889.

• Fundamental Theroy and Experimental Research • Previous Articles     Next Articles

Endchronic damage constitutive model of coal containing gas

YIN Guang-zhi 1,2，WANG Deng-ke1，ZHANG Dong-ming 1,2，WEI Zuo-an 1,2   

  1. 1. College of Resources and Environmental Sciences, Chongqing University, Chongqing 400044 China; 2. Key Laboratory for the Exploitation of Southwest Resources and the Environmental Disaster Control Engineering, Ministry of Education, Chongqing University, Chongqing 400044, China
  • Received:2007-08-29 Online:2009-04-10 Published:2011-01-30

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Abstract:

Starting from the endochronic theory, by rebuilding intrinsic time and introducing a damage variable into the Helmholtz free energy, a new set of endochronic damage constitutive equations of coal containing gas are deduced using the basic principles of the irreversible thermodynamics of continuum media; and what’s more the method for getting parameters of the constitutive model is also presented. At the same time, solution analysis and experimental validation of the equations of coal containing gas under triaxial stress condition are performed. The results show that the endochronic damage constitutive equations can describe faithfully the properties of coal containing gas before and after damage and also can reflect effectively the nonlinear and shear expansion mechanical phenomena of coal containing gas.

Key words: coal containing gas, endochronic theory, constitutive model, damage

CLC Number: 

  • TD 315
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