期刊
ENGINEERING FRACTURE MECHANICS
卷 135, 期 -, 页码 206-218出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.engfracmech.2015.01.006
关键词
Rock fracture; Circular opening; Acoustic Emission (AE); Moment tensor (MT); Uniaxial compression
类别
资金
- National Key Technology R&D Program of China [2013BAB02B01, 2013BAB02B03]
- National Natural Science Foundation of China [51274055, 51204030]
- Fundamental Research Funds for the Central University of China [N130401006, N120801002, N120701001]
- Project of the Key Science& Technology Special Project of Third Five-Year Plan of MCC [0012012009]
- Specialized Research Fund for the Doctoral Program of Higher Education of China [20130042110010]
Acoustic Emission (AE) technique and moment tensor (MT) analysis were both applied to study the spatial-temporal evolution of micro-cracks of coarse-grained granite samples, containing a circular opening, which were subjected to uniaxial compression. The results show that AE locations are in agreement with the macroscopic fractures, observed on the surface of the granite specimens after the end of the experiments. Shear cracks are dominant as the ratio is more than 40% of the total number of events, tension cracks are fewer, since they accounted for more than 30% of the total events, and mixed-mode cracks represent a minimum proportion. (C) 2015 Elsevier Ltd. All rights reserved.
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