Experimental research on critical point hypothesis |
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| Authors: | Yu Huai-zhong Yin Xiang-chu Xia Meng-fen Xu Zhao-yong Li Min Liang Nai-gang Peng Ke-yin Victor Kukshenko Wu Zhi-shen Li Qi and Surguei Elizarov |
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| Institution: | (1) State Key Laboratory of Nonlinear Mechanics, Institute of Mechanics, Chinese Academy of Sciences, 100080 Beijing, China;(2) Institute of Earthquake Science, China Earthquake Administration, 100036 Beijing, China;(3) Peking University, 100871 Beijing, China;(4) Earthquake Administration of Yunnan Province, 650041 Kunming, China;(5) Ioffe Physical Technique Institute, Russian Academy of Sciences, 194021 Petersburg, Russia;(6) Ibaraki University, 316-8511 Hetachi, Japan;(7) Interunis Ltd, 129075 Moscow, Russia |
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| Abstract: | According to the critical point hypothesis (CPH), energy release would accelerate in power law before occurrence of large
earthquakes or failure of brittle materials. In the paper, CPH was studied by acoustic emission experiments of large-scale
rock samples. Three kinds of rock samples were used in the experiments. The tri-axial loading condition was applied under
different loading histories. The released elastic energy (Acoustic emission) was recorded with acoustic emission technique
as microcracks emerged and developed inside the rock samples. The experimental results gave a further verification on the
CPH. The elastic energy release of rock samples would accelerate before the failure even under different experimental conditions.
Primary studies were also made on medium-term earthquake prediction by using accelerating energy release (AER) in the paper.
Foundation item: Project of Natural Sciences Foundation of China (10232050), Project of State Key Basic Research (2002CB412706) and Project
of Computer Network Information Center, Chinese Academy of Sciences (2002CB412706). |
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| Keywords: | critical point hypothesis accelerating energy release acoustic emission earthquake prediction |
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