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Energy Characteristics of Acoustic Emission at the Volume-Expansion Point of a Rock Bridge: A New Insight into the Evolutionary Mechanism of Coastal Cliff Collapse

文献类型：期刊论文

作者Chen, Hongran1,3; Zhai, Mengyang1,2,3; Xue, Lei1,3
刊名JOURNAL OF MARINE SCIENCE AND ENGINEERING
出版日期2021-12-01
卷号9期号:12页码:15
关键词coastal cliff rock bridge shear test acoustic emission volume-expansion point
DOI10.3390/jmse9121338
英文摘要The recession of a coast can destabilize coastal cliffs. The stability of a cliff is controlled by a rock bridge. Identifying the volume-expansion point of rock bridges is crucial to assess cliff stability, but currently there are few identifying methods. Using a numerical analytical tool, we investigate the acoustic emission characteristics during shear tests on rock bridges. Acoustic emission events with a high energy level, i.e., characteristic events which occur at the volume-expansion point of rock bridges, can indicate this point. The characteristic events, the mainshock (the maximum event corresponding to rock-bridge rupture), and the smaller events between them constitute a special activity pattern, as the micro-seismicity during the evolutionary process of a coastal cliff collapse in Mesnil-Val, NW France showed. This pattern arises in rock bridges with different mechanical properties and geometry, or under different loading conditions. Although the energy level of characteristic events and mainshocks changes with the variation of the conditions, the difference of their energy level is approximately constant. The spatial distribution of characteristic events and mainshocks can indicate the location of rock bridges. These findings help to better understand the evolutionary mechanism of collapses and provide guidelines for monitoring the stability of coastal cliffs.
WOS关键词POTENTIAL STRAIN INDICATOR ; BRITTLE FAILURE PREDICTION ; FRACTURE PROCESS ; CHALK CLIFFS ; INTACT ROCK ; PART I ; STRENGTH ; MODEL ; ANGLE ; FALL
资助项目National Natural Science Foundation of China[42107184] ; National Natural Science Foundation of China[42090052] ; China Postdoctoral Science Foundation[2018M640181]
WOS研究方向Engineering ; Oceanography
语种英语
WOS记录号WOS:000741528800001
出版者MDPI
资助机构National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; China Postdoctoral Science Foundation ; China Postdoctoral Science Foundation ; China Postdoctoral Science Foundation ; China Postdoctoral Science Foundation ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; China Postdoctoral Science Foundation ; China Postdoctoral Science Foundation ; China Postdoctoral Science Foundation ; China Postdoctoral Science Foundation ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; China Postdoctoral Science Foundation ; China Postdoctoral Science Foundation ; China Postdoctoral Science Foundation ; China Postdoctoral Science Foundation ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; China Postdoctoral Science Foundation ; China Postdoctoral Science Foundation ; China Postdoctoral Science Foundation ; China Postdoctoral Science Foundation
源URL[http://ir.iggcas.ac.cn/handle/132A11/103976]  
专题地质与地球物理研究所_中国科学院页岩气与地质工程重点实验室
通讯作者Chen, Hongran
作者单位1.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Shale Gas & Geoengn, Beijing 100029, Peoples R China
2.Univ Chinese Acad Sci, Coll Earth & Planetary Sci, Beijing 100049, Peoples R China
3.Chinese Acad Sci, Innovat Acad Earth Sci, Beijing 100029, Peoples R China
推荐引用方式
GB/T 7714		 Chen, Hongran,Zhai, Mengyang,Xue, Lei. Energy Characteristics of Acoustic Emission at the Volume-Expansion Point of a Rock Bridge: A New Insight into the Evolutionary Mechanism of Coastal Cliff Collapse[J]. JOURNAL OF MARINE SCIENCE AND ENGINEERING,2021,9(12):15.
APA Chen, Hongran,Zhai, Mengyang,&Xue, Lei.(2021).Energy Characteristics of Acoustic Emission at the Volume-Expansion Point of a Rock Bridge: A New Insight into the Evolutionary Mechanism of Coastal Cliff Collapse.JOURNAL OF MARINE SCIENCE AND ENGINEERING,9(12),15.
MLA Chen, Hongran,et al."Energy Characteristics of Acoustic Emission at the Volume-Expansion Point of a Rock Bridge: A New Insight into the Evolutionary Mechanism of Coastal Cliff Collapse".JOURNAL OF MARINE SCIENCE AND ENGINEERING 9.12(2021):15.

入库方式： OAI收割

来源：地质与地球物理研究所

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