| Experimental Research on the Load／Unload Response Ratio （LURR） Theory |
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| 作者姓名： | Yu Huaizhong Yin Xiangchu Liang Naigang Xia Mengfen Li Min Xu Zhaoyong Peng Keyin Victor Kukshenko Wu Zhishen Qi Li Surguei Elizarov |
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| 作者单位： | [1]LNM,InstituteofMechanics,ChineseAcademyofsciences,Beijing100080,China [2]CenterforAnalysisandPrediction,ChineseSeismologicalBureau,Beijing100036,China [3]PekingUniversity,Beijing100871,China [4]SeismologicalBureauofYunnanProvince,Kunming650041,China [5]IoffePhysicalTechniqueInstitute,RussianAcademyofSciences,Russia [6]IbarakiUniversity,Japan [7]InternisI.td,Moscow,Russia |
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| 基金项目： | SupportedbyNaturalSciencesFoundationofChina (grant
No .10 2 32 0 5 0and 4 0 0 0 4 0 0 2 )，DepartmentofInternationalCooperationofMinistryofScienceandTechnology，China
SeismologicalBureauandScholarsStudyingAbroadandContinuousEducationofBureauofPersonn |
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| 摘 要： | Implementing acoustic emission experiments with large rock samples, LURR (Load/Unload Response Ratio) theory was studied. The loading conditions in the experiments were designed to simulate the complicated loading process of underground rocks. The damages emerging inside the rock samples were recorded by the acoustic emission technique during the loading process. The experimental results were consistent with prediction by LURR theory. Integrating the changing processes of LURR value Y and the location process of acoustic emission events showed agreement between the variation of LURR value Y and the damage evolution inside the rocks. Furthermore, the high value of Y emerged before the complete breakdown of materials. Therefore, the damage evolution of rock specimen can be quantitatively analyzed with LURR theory, thus the failure of the rock materials and the earthquake occurrence may be predicted. The experimental results gave a further verification of LURR theory.
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| 关 键 词： | 实验调查 地震学 声学 自然灾害 |
Experimental Research on the Load/Unload Response Ratio (LURR) Theory |
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| Yu Huaizhong,Yin Xiangchu,Liang Naigang,Xia Mengfen,Li Min,Xu Zhaoyong,Peng Keyin,Victor Kukshenko,Wu Zhishen,Qi Li,Surguei Elizarov.Experimental Research on the Load/Unload Response Ratio (LURR) Theory[J].Earthquake Research in China,2003,17(3):227-235. |
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| Authors: | Yu Huaizhong Yin Xiangchu Liang Naigang Xia Mengfen Li Min Xu Zhaoyong Peng Keyin Victor Kukshenko Wu Zhishen Qi Li and Surguei Elizarov |
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| Institution: | LNM, Institute of Mechanics, Chinese Academy of sciences, Beijing 100080, China;LNM, Institute of Mechanics, Chinese Academy of sciences, Beijing 100080, China;Center for Analysis and Prediction, Chinese Seismological Bureau, Beijing 100036, China;LNM, Institute of Mechanics, Chinese Academy of sciences, Beijing 100080, China;LNM, Institute of Mechanics, Chinese Academy of sciences, Beijing 100080, China; PekingUniversity,Beijing100871,China;LNM, Institute of Mechanics, Chinese Academy of sciences, Beijing 100080, China;SeismologicalBureauofYunnanProvince,Kunming650041,China;LNM, Institute of Mechanics, Chinese Academy of sciences, Beijing 100080, China;Center for Analysis and Prediction, Chinese Seismological Bureau, Beijing 100036, China;IoffePhysicalTechniqueInstitute,RussianAcademyofSciences,Russia;IbarakiUniversity,Japan;IbarakiUniversity,Japan;InternisI.td,Moscow,Russia |
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| Abstract: | Implementing acoustic emission experiments with large rock samples, LURR (Load/Unload Response Ratio) theory was studied. The loading conditions in the experiments were designed to simulate the complicated loading process of underground rocks. The damages emerging inside the rock samples were recorded by the acoustic emission technique during the loading process. The experimental results were consistent with prediction by LURR theory. Integrating the changing processes of LURR value Y and the location process of acoustic emission events showed agreement between the variation of LURR value Y and the damage evolution inside the rocks. Furthermore, the high value of Y emerged before the complete breakdown of materials. Therefore, the damage evolution of rock specimen can be quantitatively analyzed with LURR theory, thus the failure of the rock materials and the earthquake occurrence may be predicted. The experimental results gave a further verification of LURR theory. |
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| Keywords: | Load/Unload Response Ratio Acoustic emission Circling load Large sample Critical sensitivity |
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