›› 2015, Vol. 36 ›› Issue (6): 1633-1642.doi: 10.16285/j.rsm.2015.06.015

• Fundamental Theroy and Experimental Research • Previous Articles     Next Articles

CT image reconstruction of coal rock three-dimensional fractures and body fractal dimension under triaxial compression test

LI Guo1, 2，ZHANG Ru1, 2，XU Xiao-lian1, 2，ZHANG Yan-fei1, 2   

  1. 1. State Key Laboratory of Hydraulics and Mountain River Engineering, Sichuan University, Chengdu,Sichuan 610065, China; 2. College of Water Resource and Hydropower, Sichuan University, Chengdu,Sichuan 610065, China
  • Received:2014-05-07 Online:2015-06-11 Published:2018-06-14

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Abstract: The conventional triaxial compression test is conducted on coal specimens, then the destroyed coal specimens are taken to perform CT scanning test, and thus the spatial distributions of fracture within the coal specimens are obtained by importing processed CT images into Mimics10.01. In addition, the body fractal dimension of coal specimens is preliminarily analyzed by self-compiled Matlab program. The results show that under triaxial compression condition, compression and shear failures prevail in coal specimens, and coal specimens exhibit a specific mechanical mechanism with varying confining pressure. The spatial distribution of coal three-dimensional fractures reconstructed by Mimics10.01 indicates that the connectivity rate and bulk density of shear failure plane of coal specimens tend to increase with the confining pressure. And the calculated results of body fractal dimension suggest that the more serious damage inside coal rock, the lower the fractal dimension value.

Key words: coal, fracture network, three-dimensional reconstruction, body fractal dimension

CLC Number: 

  • TU443
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