The Relation between Acoustic Emission Activity and Growth of Crack in the Fracture Process of Rocks.
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Accession number;02A0401208
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| Title;The Relation between Acoustic Emission Activity and Growth of Crack in the Fracture Process of Rocks. |
| Author;
IMAI TADAO
(Akita Univ., Facutity of Engineering and Resource Sci, JPN)
SUGIMOTO FUMIO
(Akita Univ., Facutity of Engineering and Resource Sci, JPN)
KAMOSHIDA NAOTO
(Akita Univ., Graduate School of Mining and Engineering, JPN)
YAMASHITA SHIGERU
(Akita Univ., Facutity of Engineering and Resource Sci, JPN)
FURUZUMI MITSUMASA
(Iwate Univ., Fac. of Eng.)
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Journal Title;Journal of the Japan Society of Engineering Geology
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Journal Code:G0269B
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ISSN:0286-7737
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VOL.43;NO.1;PAGE.14-23(2002)
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| Figure&Table&Reference;FIG.8, REF.17 |
| Pub. Country;Japan |
| Language;Japanese |
| Abstract;AE amplitude frequency distribution shows a power law by AE activities in the fracture process of rocks. This law is critical for the prediction of the rock fracture. Therefore, in the rock fracture process, if the relationship between the slope of AE amplitude frequency distribution and crack growth was made clear, then the prediction of rock fracture can be made possible by the analysis of the real time of AE amplitude frequency distribution. In this study, we investigats the slope (|b| value) of the AE amplitude frequency distribution in the compaction fracture process of rock specimen and the observation of the crack growth in rock specimen after test with the microscope. In the result of the AE measurement, the |b| value for granite and sandstone decreases before the failure, but that for marble and tuff hardly decreases. Therefore, the observation of the cracks with the microscope, for granite and sandstone revealing that the |b| values decreases, the large under intercrystalline cracks grow. For marble revealing that |b| value hardly decreases, the intracrystalline cracks grow closely, but, for tuff, the cracks hardly grows except for along the shear plane. (author abst.) |
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