Anisotropic Failure Strength of Shale with Increasing Confinement: Behaviors, Factors and Mechanism

doi:10.3390/ma10111310

	Anisotropic Failure Strength of Shale with Increasing Confinement: Behaviors, Factors and Mechanism
	Cheng, Cheng 1,2,3; Li, Xiao 1,2,3; Qian, Haitao 4
刊名	MATERIALS
	2017-11-01
卷号	10 期号:11
关键词	Shale Anisotropic Failure Strength Anisotropy Confinement Cohesion And Friction Angle Of Weak Planes
ISSN号	1996-1944
DOI	10.3390/ma10111310
文献子类	Article
英文摘要	Some studies reported that the anisotropic failure strength of shale will be weakened by increasing confinement. In this paper, it is found that there are various types of anisotropic strength behaviors. Four types of anisotropic strength ratio (SA(1)) behaviors and three types of anisotropic strength difference (SA(2)) behaviors have been classified based on laboratory experiments on nine groups of different shale samples. The cohesion c(w) and friction angle phi(w) of the weak planes are proven to be two dominant factors according to a series of bonded-particle discrete element modelling analyses. It is observed that shale is more prone to a slight increase of SA(1) and significant increase of SA(2) with increasing confinement for higher cohesion c(w) and lower to medium friction angle phi(w). This study also investigated the mechanism of the anisotropic strength behaviors with increasing confinement. Owing to different contributions of c(w) and phi(w) under different confinements, different combinations of c(w) and phi(w) may have various types of influences on the minimum failure strength with the increasing confinement; therefore, different types of anisotropic behaviors occur for different shale specimens as the confinement increases. These findings are very important to understand the stability of wellbore and underground tunneling in the shale rock mass, and should be helpful for further studies on hydraulic fracture propagations in the shale reservoir.
WOS关键词	BONDED-PARTICLE MODEL ; TRANSVERSELY ISOTROPIC ROCK ; UNIAXIAL COMPRESSION ; SIMULATION ; HETEROGENEITY ; DEFORMATION ; IMPACT ; MASS
WOS研究方向	Materials Science
语种	英语
出版者	MDPI AG
WOS记录号	WOS:000416786200088
资助机构	Chinese Academy of Sciences(XDB10030301) ; Chinese Academy of Sciences(XDB10030301) ; Chinese Academy of Sciences(XDB10030301) ; Chinese Academy of Sciences(XDB10030301) ; National Natural Science Foundation of China(41402286 ; National Natural Science Foundation of China(41402286 ; National Natural Science Foundation of China(41402286 ; National Natural Science Foundation of China(41402286 ; State Key Laboratory of Geohazard Prevention and Geoenvironment Protection (Chengdu University of Technology)(SKLGP2016K001) ; State Key Laboratory of Geohazard Prevention and Geoenvironment Protection (Chengdu University of Technology)(SKLGP2016K001) ; State Key Laboratory of Geohazard Prevention and Geoenvironment Protection (Chengdu University of Technology)(SKLGP2016K001) ; State Key Laboratory of Geohazard Prevention and Geoenvironment Protection (Chengdu University of Technology)(SKLGP2016K001) ; 41227901) ; 41227901) ; 41227901) ; 41227901) ; Chinese Academy of Sciences(XDB10030301) ; Chinese Academy of Sciences(XDB10030301) ; Chinese Academy of Sciences(XDB10030301) ; Chinese Academy of Sciences(XDB10030301) ; National Natural Science Foundation of China(41402286 ; National Natural Science Foundation of China(41402286 ; National Natural Science Foundation of China(41402286 ; National Natural Science Foundation of China(41402286 ; State Key Laboratory of Geohazard Prevention and Geoenvironment Protection (Chengdu University of Technology)(SKLGP2016K001) ; State Key Laboratory of Geohazard Prevention and Geoenvironment Protection (Chengdu University of Technology)(SKLGP2016K001) ; State Key Laboratory of Geohazard Prevention and Geoenvironment Protection (Chengdu University of Technology)(SKLGP2016K001) ; State Key Laboratory of Geohazard Prevention and Geoenvironment Protection (Chengdu University of Technology)(SKLGP2016K001) ; 41227901) ; 41227901) ; 41227901) ; 41227901) ; Chinese Academy of Sciences(XDB10030301) ; Chinese Academy of Sciences(XDB10030301) ; Chinese Academy of Sciences(XDB10030301) ; Chinese Academy of Sciences(XDB10030301) ; National Natural Science Foundation of China(41402286 ; National Natural Science Foundation of China(41402286 ; National Natural Science Foundation of China(41402286 ; National Natural Science Foundation of China(41402286 ; State Key Laboratory of Geohazard Prevention and Geoenvironment Protection (Chengdu University of Technology)(SKLGP2016K001) ; State Key Laboratory of Geohazard Prevention and Geoenvironment Protection (Chengdu University of Technology)(SKLGP2016K001) ; State Key Laboratory of Geohazard Prevention and Geoenvironment Protection (Chengdu University of Technology)(SKLGP2016K001) ; State Key Laboratory of Geohazard Prevention and Geoenvironment Protection (Chengdu University of Technology)(SKLGP2016K001) ; 41227901) ; 41227901) ; 41227901) ; 41227901) ; Chinese Academy of Sciences(XDB10030301) ; Chinese Academy of Sciences(XDB10030301) ; Chinese Academy of Sciences(XDB10030301) ; Chinese Academy of Sciences(XDB10030301) ; National Natural Science Foundation of China(41402286 ; National Natural Science Foundation of China(41402286 ; National Natural Science Foundation of China(41402286 ; National Natural Science Foundation of China(41402286 ; State Key Laboratory of Geohazard Prevention and Geoenvironment Protection (Chengdu University of Technology)(SKLGP2016K001) ; State Key Laboratory of Geohazard Prevention and Geoenvironment Protection (Chengdu University of Technology)(SKLGP2016K001) ; State Key Laboratory of Geohazard Prevention and Geoenvironment Protection (Chengdu University of Technology)(SKLGP2016K001) ; State Key Laboratory of Geohazard Prevention and Geoenvironment Protection (Chengdu University of Technology)(SKLGP2016K001) ; 41227901) ; 41227901) ; 41227901) ; 41227901)
内容类型	期刊论文
源URL	[http://ir.iggcas.ac.cn/handle/132A11/82074]
专题	中国科学院地质与地球物理研究所
通讯作者	Li, Xiao
作者单位	1.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Shale Gas & Geoengn, Beijing 100029, Peoples R China 2.Chinese Acad Sci, Inst Earth Sci, Beijing 100029, Peoples R China 3.Univ Chinese Acad Sci, Coll Earth Sci, Beijing 100049, Peoples R China 4.China Earthquake Adm, Inst Crustal Dynam, Beijing 100085, Peoples R China
推荐引用方式 GB/T 7714	Cheng, Cheng,Li, Xiao,Qian, Haitao. Anisotropic Failure Strength of Shale with Increasing Confinement: Behaviors, Factors and Mechanism[J]. MATERIALS,2017,10(11).
APA	Cheng, Cheng,Li, Xiao,&Qian, Haitao.(2017).Anisotropic Failure Strength of Shale with Increasing Confinement: Behaviors, Factors and Mechanism.MATERIALS,10(11).
MLA	Cheng, Cheng,et al."Anisotropic Failure Strength of Shale with Increasing Confinement: Behaviors, Factors and Mechanism".MATERIALS 10.11(2017).