The Influence of Infilling Conditions on Flaw Surface Relative Displacement Induced Cracking Behavior in Hard Rock

doi:10.1007/s00603-019-02033-x

	The Influence of Infilling Conditions on Flaw Surface Relative Displacement Induced Cracking Behavior in Hard Rock
	Pan, Peng-Zhi 2,3; Miao, Shuting 1,3; Jiang, Quan 3; Wu, Zhenhua 1,3; Shao, Changyue 1,3
刊名	ROCK MECHANICS AND ROCK ENGINEERING
	2019-12-19
期号	-页码:22
关键词	Infilling condition Relative displacement of flaw surfaces Cracking behaviors Digital image correlation
ISSN号	0723-2632
DOI	10.1007/s00603-019-02033-x
英文摘要	The relative tangential displacement (or slip) and relative normal displacement of flaw surfaces are two of the main factors driving crack initiation and propagation of rocks. In this study, uniaxial compression experiments are performed in flawed marble under different cases, i.e., open flaw and flaw filled by gypsum, cement and resin, and different flaw inclinations, to study the influence of infilling conditions on the flaw surface relative displacement (i.e., relative tangential and normal displacement) and the induced cracking behaviors, such as crack initiation, propagation and crack patterns. The digital image correlation (DIC) technique is used to trace the evolution of relative deformation across the flaw surface and cracking process of flawed specimens. The results reveal that the difference in flaw surface relative displacement, at a given load, is introduced by different infilling materials. Among the four types of flaws, the filled flaw with smaller relative displacement is less likely to initiate cracks than the unfilled flaw with larger relative displacement. Moreover, the crack initiation position, angle, and types are also dependent on the relative deformation between the flaw surfaces. With the increase of the stiffness of the filler or flaw inclination angle, the effect of relative normal displacement on the cracking behavior is weakened, while the effect of relative tangential displacement increasingly dominates. As a result, the filled flaw with smaller relative normal displacement makes wing crack initiation points closer to flaw tips. Moreover, the filler with higher stiffness makes the wing crack initiation angle smaller, improves the possibility of the quasi-coplanar crack initiation, and suppresses the initiation of anti-wing cracks from the flaw tips in hard rock.
资助项目	State Key Research Development Program of China[2017YFC0804203] ; National Nature Science Foundation of China[51621006] ; Key Research Program of Frontier Sciences, Chinese Academy of Sciences[QYZDB-SSW-DQC029]
WOS研究方向	Engineering ; Geology
语种	英语
出版者	SPRINGER WIEN
WOS记录号	WOS:000575439800001
内容类型	期刊论文
源URL	[http://119.78.100.198/handle/2S6PX9GI/24863]
专题	中科院武汉岩土力学所
作者单位	1.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 2.Northeastern Univ, Minist Educ Safe Min Deep Met Mines, Key Lab, Shenyang 110819, Liaoning, Peoples R China 3.Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn, Wuhan 430071, Hubei, Peoples R China
推荐引用方式 GB/T 7714	Pan, Peng-Zhi,Miao, Shuting,Jiang, Quan,et al. The Influence of Infilling Conditions on Flaw Surface Relative Displacement Induced Cracking Behavior in Hard Rock[J]. ROCK MECHANICS AND ROCK ENGINEERING,2019(-):22.
APA	Pan, Peng-Zhi,Miao, Shuting,Jiang, Quan,Wu, Zhenhua,&Shao, Changyue.(2019).The Influence of Infilling Conditions on Flaw Surface Relative Displacement Induced Cracking Behavior in Hard Rock.ROCK MECHANICS AND ROCK ENGINEERING(-),22.
MLA	Pan, Peng-Zhi,et al."The Influence of Infilling Conditions on Flaw Surface Relative Displacement Induced Cracking Behavior in Hard Rock".ROCK MECHANICS AND ROCK ENGINEERING .-(2019):22.