Temporal and spatial distribution of microfractures in granites of different structures under triaxial compression and its significance in seismology |
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Authors: | Liqiang Liu Shengli Ma Jin Ma Xinglin Lei K Kusunose O Nishizawa L Jouniaux |
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Institution: | (1) Institute of Geology, China Seismological Bureau, 100029 Beijing, China;(2) Geological Survey of Japan, Tsukuba, Japan;(3) Laboratoire de Geologie & CNRS, URA, 1316 Paris, France |
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Abstract: | The temporal and spatial distribution of microfracturing activity in two kinds of granite under triaxial compression has been
studied by using a new acoustic emission system. For Inada granite, there is no clear clustering of acoustic emission events
in time and space, thus it is difficult to exactly deduce the time and position of the major fracturing. While for Mayet granite,
acoustic emission events are clustered in time and space, so the time and position of the major fracturing can be exactly
predicted according to microfracturing process. Such a difference may result from the difference in deformation mode caused
by different rock structures. |
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Keywords: | rock structure acoustic emission microfracturing temporal and spatial distribution seismicity |
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