›› 2012, Vol. 33 ›› Issue (9): 2575-2580.

• Fundamental Theroy and Experimental Research • Previous Articles     Next Articles

Analysis of critical acoustic emission information of sandstone brittle failure with stress ratio

SUN Qiang1, 2, 3, XUE Lei2, ZHU Shu-yun1   

  1. 1. School of Resources and Earth Science, China University of Mining and Technology, Xuzhou, Jiangsu 221116, China; 2. Key Laboratory of Engineering Geomechanics, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100029, China; 3. State Key Laboratory for Geomechanics and Deep Underground Engineering, China University of Mining & Technology, Xuzhou, Jiangsu 221116, China
  • Received:2011-04-20 Online:2012-09-11 Published:2012-09-12

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Abstract: According to the constitutive equation of rock brittle fracture and 3D renormalization group theory, it is obtained the mathematical expression of stress ration between the critical point before fracture and peaking point. The acoustic emission (AE) characteristics of deep purple red sandstone under uniaxial compression are tested and obtained in the laboratory. According to the relevant test data, it is shown that the stress ratio between the AE mutation of critical state and peaking state has a value of nearly to 74%, and the deviation is less than ±9%.

Key words: acoustic emission, brittle failure, renormalization, stress-strain curve

CLC Number: 

  • TD 315
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