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Effects of bedding orientation on the failure pattern and acoustic emission activity of shale under uniaxial compression

文献类型：期刊论文

作者Chen, Hongran1,5; Di, Qingyun1,2,3,5; Zhang, Wenxiu1,2,3,5; Li, Yuan1,3,5; Niu, Jingrui4
刊名GEOMECHANICS AND GEOPHYSICS FOR GEO-ENERGY AND GEO-RESOURCES
出版日期2021-03-01
卷号7期号:1页码:17
关键词Shale Bedding orientation Acoustic emission Computed tomography Failure pattern Brittleness
ISSN号2363-8419
DOI10.1007/s40948-021-00216-x
英文摘要The bedding orientation influences the failure pattern and brittleness of shale. Clarifying the relation between acoustic emission and the effects of bedding orientation on the failure behaviors of shale is important to understand the mechanism of the formation of fracture networks. In this study, we analyzed the failure patterns and crack complexity of the shale specimens with various bedding orientations under uniaxial compression using X-ray computed tomography. We proposed an improved criterion based on the acoustic emission waveform parameters to identify the mechanism of the acoustic emission events and showed that the failure mechanism changed from tension to shear during the failure process of each specimen because the shear cracks link independent tensile cracks to form macrofractures in the later loading stage. The proportion of shear-mode events in the specimens declined when the bedding orientation angle increased from 0 degrees to 90 degrees, whereas that of the tensile-mode events exhibited an opposite trend; these changes were consistent with the observation results of X-ray images, indicating the transition of the dominant failure mechanisms with the bedding orientation. The large b value of the acoustic emission events corresponded to a complex crack distribution; thus, this b value may be useful to evaluate the brittleness of shale. These results denote the relation between the mechanisms of the failure patterns in shale and the acoustic emission activity and improve our recognition to the fracture network characteristics.
资助项目Strategic Priority Research Program of Chinese Academy of Sciences[XDA14050101] ; Strategic Priority Research Program of Chinese Academy of Sciences[XDA14020401] ; Strategic Priority Research Program of Chinese Academy of Sciences[XDB10030302] ; National Key Research and Develop Program of China[2019YFA0708301] ; China Postdoctoral Science Foundation[2018M640181] ; National Natural Science Foundation of China[41602330]
WOS研究方向Energy & Fuels ; Engineering ; Geology
语种英语
WOS记录号WOS:000614414400001
出版者SPRINGER HEIDELBERG
资助机构Strategic Priority Research Program of Chinese Academy of Sciences ; Strategic Priority Research Program of Chinese Academy of Sciences ; Strategic Priority Research Program of Chinese Academy of Sciences ; Strategic Priority Research Program of Chinese Academy of Sciences ; National Key Research and Develop Program of China ; National Key Research and Develop Program of China ; National Key Research and Develop Program of China ; National Key Research and Develop Program 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 ; Strategic Priority Research Program of Chinese Academy of Sciences ; Strategic Priority Research Program of Chinese Academy of Sciences ; Strategic Priority Research Program of Chinese Academy of Sciences ; Strategic Priority Research Program of Chinese Academy of Sciences ; National Key Research and Develop Program of China ; National Key Research and Develop Program of China ; National Key Research and Develop Program of China ; National Key Research and Develop Program 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 ; Strategic Priority Research Program of Chinese Academy of Sciences ; Strategic Priority Research Program of Chinese Academy of Sciences ; Strategic Priority Research Program of Chinese Academy of Sciences ; Strategic Priority Research Program of Chinese Academy of Sciences ; National Key Research and Develop Program of China ; National Key Research and Develop Program of China ; National Key Research and Develop Program of China ; National Key Research and Develop Program 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 ; Strategic Priority Research Program of Chinese Academy of Sciences ; Strategic Priority Research Program of Chinese Academy of Sciences ; Strategic Priority Research Program of Chinese Academy of Sciences ; Strategic Priority Research Program of Chinese Academy of Sciences ; National Key Research and Develop Program of China ; National Key Research and Develop Program of China ; National Key Research and Develop Program of China ; National Key Research and Develop Program 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
源URL[http://ir.iggcas.ac.cn/handle/132A11/100044]  
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
地质与地球物理研究所_深部资源勘探装备研发
通讯作者Di, Qingyun
作者单位1.Chinese Acad Sci, Innovat Acad Earth Sci, Beijing, Peoples R China
2.Chinese Acad Sci, Inst Geol & Geophys, CAS Engn Lab Deep Resources Equipment & Technol, Beijing, Peoples R China
3.Univ Chinese Acad Sci, Coll Earth & Planetary Sci, Beijing, Peoples R China
4.Chinese Soc Rock Mech & Engn, Beijing, Peoples R China
5.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Shale Gas & Geoengn, Beijing, Peoples R China
推荐引用方式
GB/T 7714		 Chen, Hongran,Di, Qingyun,Zhang, Wenxiu,et al. Effects of bedding orientation on the failure pattern and acoustic emission activity of shale under uniaxial compression[J]. GEOMECHANICS AND GEOPHYSICS FOR GEO-ENERGY AND GEO-RESOURCES,2021,7(1):17.
APA Chen, Hongran,Di, Qingyun,Zhang, Wenxiu,Li, Yuan,&Niu, Jingrui.(2021).Effects of bedding orientation on the failure pattern and acoustic emission activity of shale under uniaxial compression.GEOMECHANICS AND GEOPHYSICS FOR GEO-ENERGY AND GEO-RESOURCES,7(1),17.
MLA Chen, Hongran,et al."Effects of bedding orientation on the failure pattern and acoustic emission activity of shale under uniaxial compression".GEOMECHANICS AND GEOPHYSICS FOR GEO-ENERGY AND GEO-RESOURCES 7.1(2021):17.

入库方式： OAI收割

来源：地质与地球物理研究所

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