The b-value analysis of bedded shale under cyclic loading tests

doi:10.1088/1742-2140/aaaf48

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

	The b-value analysis of bedded shale under cyclic loading tests
	Wang, Miaomiao 1,2; Xiao, Lihui 3
刊名	JOURNAL OF GEOPHYSICS AND ENGINEERING
	2018-08-01
卷号	15 期号:4 页码:1291-1299
关键词	Shale Bedding Plane Progressive Damage B-value Sample Range Cyclic Load
ISSN号	1742-2132
DOI	10.1088/1742-2140/aaaf48
文献子类	Article
英文摘要	Research on the damage evolution of bedded shale which can be described by different scales of cracks from micro- to macro-damage is significant. The b-value representing the relative proportion of micro- cracking to macro-cracking could be a good index for estimating the damage process of granite, sandstone, and marble as most of the previous studies have reported. The variation of the b-value of shale specimens with different bedding plane orientations subjected to cyclic load was investigated here. To ensure the reliability of the determination of the b-values, both the least squares method and maximum likelihood estimate were applied. And the sample range of acoustic emission events in data processing was redefined so that the previously generated cracks as well as the current formed cracks in this time window could all be used to calculate the b-value which reflects the accumulation of damage in one loading cycle. Cyclic load tests on stress levels with the first peak load of 30%-50% and above 80% of the estimated uniaxial failure strength, respectively, were conducted for shale specimens with bedding planes parallel and perpendicular to the loading direction. A change trend of the b-value in each test is observed as decreasing for one load cycle around the failure strength as well as the cyclic loading process prior to the final failure. Thus, this phenomenon of shale, only appearing as the stress exceeds 80% of the failure strength, has neither a relationship with the bedding plane nor the loading paths.
WOS关键词	POWER-LAW DISTRIBUTIONS ; ACOUSTIC-EMISSION ; ROCK FRACTURE ; EVOLUTION ; DAMAGE ; SEISMICITY
WOS研究方向	Geochemistry & Geophysics
语种	英语
出版者	IOP PUBLISHING LTD
WOS记录号	WOS:000430581500009
资助机构	Strategic Priority Research Program of the Chinese Academy of Sciences(XDB10030302) ; Strategic Priority Research Program of the Chinese Academy of Sciences(XDB10030302) ; Strategic Priority Research Program of the Chinese Academy of Sciences(XDB10030302) ; Strategic Priority Research Program of the Chinese Academy of Sciences(XDB10030302) ; Strategic Priority Research Program of the Chinese Academy of Sciences(XDB10030302) ; Strategic Priority Research Program of the Chinese Academy of Sciences(XDB10030302) ; Strategic Priority Research Program of the Chinese Academy of Sciences(XDB10030302) ; Strategic Priority Research Program of the Chinese Academy of Sciences(XDB10030302)
内容类型	期刊论文
源URL	[http://ir.iggcas.ac.cn/handle/132A11/88322]
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, Miaomiao
作者单位	1.Chinese Acad Geol Sci, Inst Geomech, Beijing 100081, Peoples R China 2.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Shale Gas & Geoengn, Beijing 100029, Peoples R China 3.Chongqing Res Inst China Coal Technol, Chongqing 400039, Peoples R China
推荐引用方式 GB/T 7714	Wang, Miaomiao,Xiao, Lihui. The b-value analysis of bedded shale under cyclic loading tests[J]. JOURNAL OF GEOPHYSICS AND ENGINEERING,2018,15(4):1291-1299.
APA	Wang, Miaomiao,&Xiao, Lihui.(2018).The b-value analysis of bedded shale under cyclic loading tests.JOURNAL OF GEOPHYSICS AND ENGINEERING,15(4),1291-1299.
MLA	Wang, Miaomiao,et al."The b-value analysis of bedded shale under cyclic loading tests".JOURNAL OF GEOPHYSICS AND ENGINEERING 15.4(2018):1291-1299.