Experimental investigation on the fracture behaviour of black shale by acoustic emission monitoring and CT image analysis during uniaxial compression

doi:10.1093/gji/ggy011

CORC > 地质与地球物理研究所 > 中国科学院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

	Experimental investigation on the fracture behaviour of black shale by acoustic emission monitoring and CT image analysis during uniaxial compression
	Wang, Y.1,2; Li, C. H.1,2; Hu, Y. Z.3
刊名	GEOPHYSICAL JOURNAL INTERNATIONAL
	2018-04-01
卷号	213 期号:1 页码:660-675
关键词	Defects Geomechanics Geopotential theory
ISSN号	0956-540X
DOI	10.1093/gji/ggy011
英文摘要	Plenty of mechanical experiments have been done to investigate the deformation and failure characteristics of shale; however, the anisotropic failure mechanism has not been well studied. Here, laboratory Uniaxial Compressive Strength tests on cylindrical shale samples obtained by drilling at different inclinations to bedding plane were performed. The failure behaviours of the shale samples were studied by real-time acoustic emission (AE) monitoring and post-test X-ray computer tomography (CT) analysis. The experimental results suggest that the pronounced bedding planes of shale have a great influence on the mechanical properties and AE patterns. The AE counts and AE cumulative energy release curves clearly demonstrate different morphology, and the 'U'-shaped curve relationship between the AE counts, AE cumulative energy release and bedding inclination was first documented. The post-test CT image analysis shows the crack patterns via 2-D image reconstructions, an index of stimulated fracture density is defined to represent the anisotropic failure mode of shale. What is more, the most striking finding is that the AE monitoring results are in good agreement with the CT analysis. The structural difference in the shale sample is the controlling factor resulting in the anisotropy of AE patterns. The pronounced bedding structure in the shale formation results in an anisotropy of elasticity, strength and AE information from which the changes in strength dominate the entire failure pattern of the shale samples.
资助项目	National Natural Science Foundation of China[41502294] ; Fundamental Research Funds for the Central Universities[2302017FRF-TP-17-027A1] ; National key technologies Research and Development program[2017YFC0804609]
WOS关键词	MECHANICAL-PROPERTIES ; ANISOTROPIC PROPERTIES ; CONFINING PRESSURES ; TOURNEMIRE SHALE ; OPALINUS CLAY ; STRESS ; ROCKS ; BRITTLENESS ; TEMPERATURE ; STRENGTH
WOS研究方向	Geochemistry & Geophysics
语种	英语
出版者	OXFORD UNIV PRESS
WOS记录号	WOS:000448715000042
资助机构	National Natural Science Foundation of China ; National Natural Science Foundation of China ; Fundamental Research Funds for the Central Universities ; Fundamental Research Funds for the Central Universities ; National key technologies Research and Development program ; National key technologies Research and Development program ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Fundamental Research Funds for the Central Universities ; Fundamental Research Funds for the Central Universities ; National key technologies Research and Development program ; National key technologies Research and Development program ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Fundamental Research Funds for the Central Universities ; Fundamental Research Funds for the Central Universities ; National key technologies Research and Development program ; National key technologies Research and Development program ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Fundamental Research Funds for the Central Universities ; Fundamental Research Funds for the Central Universities ; National key technologies Research and Development program ; National key technologies Research and Development program
内容类型	期刊论文
源URL	[http://ir.iggcas.ac.cn/handle/132A11/89149]
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	Wang, Y.
作者单位	1.Univ Sci & Technol Beijing, Beijing Key Lab Urban Underground Space Engn, Dept Civil Engn, Sch Civil & Resource Engn, Beijing 100083, Peoples R China 2.Univ Sci & Technol Beijing, Key Lab, Minist Educ China High Efficient Min & Safety Met, Beijing 100083, Peoples R China 3.Chinese Acad Sci, Key Lab Shale Gas & Geoengn, Inst Geol & Geophys, Beijing 100029, Peoples R China
推荐引用方式 GB/T 7714	Wang, Y.,Li, C. H.,Hu, Y. Z.. Experimental investigation on the fracture behaviour of black shale by acoustic emission monitoring and CT image analysis during uniaxial compression[J]. GEOPHYSICAL JOURNAL INTERNATIONAL,2018,213(1):660-675.
APA	Wang, Y.,Li, C. H.,&Hu, Y. Z..(2018).Experimental investigation on the fracture behaviour of black shale by acoustic emission monitoring and CT image analysis during uniaxial compression.GEOPHYSICAL JOURNAL INTERNATIONAL,213(1),660-675.
MLA	Wang, Y.,et al."Experimental investigation on the fracture behaviour of black shale by acoustic emission monitoring and CT image analysis during uniaxial compression".GEOPHYSICAL JOURNAL INTERNATIONAL 213.1(2018):660-675.