Developments in detection of rock damage

Peng Ruidong; Liu Hongbin; Wang Jianqiang; Ju Yang

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Developments in detection of rock damage

Peng Ruidong 1 * #,Liu Hongbin 2,Wang Jianqiang 2,Ju Yang 2

1.State Key Lab of Coal Resources and Safe Mining, China University of Mining and Technology

2.State Key Lab of Coal Resources and Safe Mining, China University of Mining and Technology, Beijing 100083

*Correspondence author

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Funding: Specialized Research Fund for the Doctoral Program of Higher Education （No.No. 20070290011）, Fundamental Research Funds for the Central Universities （No.No. 2009QM03）, National Natural Science Foundation of China （No.No. 10802092）

Opened online:21 January 2011

Accepted by: none

Citation: Peng Ruidong,Liu Hongbin,Wang Jianqiang.Developments in detection of rock damage[OL]. [21 January 2011] http://en.paper.edu.cn/en_releasepaper/content/4406769

How to quantificationally detect the damage of rocks is a key problem in damage mechanics for rocks, and it determined whether the damage theory of rocks could be brought into action in rock engineering. Detection techniques of rock damage were summarized and grouped into structural analysis approaches and feature measurement approaches, which include SEM analysis, CT detection, stress-strain measurement, wave detection, acoustic emission monitoring, infrared radiation detection, etc. All kinds of damage variables resulted from different methods are equipollent in thermodynamics, and they are an internal variable to characterize damage state. The distinguish of each kind of damage variable is that different formations of state equations and dynamic equations would be derived from different variables. It was suggested that the favorable rock damage variables should be selected according to the thermodynamics principle and those convenient to detect and easy to analysis should be adopted preferably.

Keywords:Damage mechanics; Damage variable; Rock; Damage detection

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