Investigations of P-Wave velocity, mechanical behavior and thermal properties of anisotropic slate

doi:10.1016/j.ijrmms.2019.104176

	Investigations of P-Wave velocity, mechanical behavior and thermal properties of anisotropic slate
	Ding, Changdong 2,3; Hu, Dawei 2,3; Zhou, Hui 2,3; Lu, Jingjing 2,3; Lv, Tao 1
刊名	INTERNATIONAL JOURNAL OF ROCK MECHANICS AND MINING SCIENCES
	2020-03-01
卷号	127 页码:13
关键词	Slate anisotropy Microstructure analysis Mechanical behavior Thermal property
ISSN号	1365-1609
DOI	10.1016/j.ijrmms.2019.104176
英文摘要	Rock anisotropies are an important indicator for design and construction of various engineering projects across the world. To investigate the anisotropic characteristics of P-wave velocity, mechanical behavior and thermal properties, laboratory tests were performed on slate samples with various foliation orientations with respect to horizontal direction. The results indicate that the uniaxial compression strength (UCS) exhibits a typical U-type trend, the Young's modulus first decreases and then increases, and the variation of Poisson's ratio shows an opposite trend with the variation in Young's modulus. The anisotropy in strength is greater than that in deformation. Three typical failure modes, i.e. splitting across the foliation planes, shearing and sliding along the foliation planes, and axial splitting failure along the foliation planes, were observed. Scanning electron microscope (SEM) was also applied to analyze the microscopic failure mechanisms. It shows that the slate anisotropies are intrinsically attributed to the directional arrangement of mineral compositions observed by polarizing microscope. P-wave velocity and thermal conductivity both increase with increasing foliation angle, but the linear coefficients of thermal expansion show a decreasing trend. A new empirical formula was then proposed for describing the P-wave velocity and thermal parameters with respect to foliation angle of slate. It displays the empirical predictions match the laboratory measurements. The obtained results can better facilitate our understanding of mechanical behavior and thermal properties of anisotropic rocks, which should be considered in underground engineering applications in layered strata.
资助项目	National Key Research and Development Program of China[2018YFC0809600] ; National Key Research and Development Program of China[2018YFC0809601] ; National Natural Science Foundation of China[51779252] ; Major Technological Innovation Projects of Hubei, China[2017AAA128]
WOS研究方向	Engineering ; Mining & Mineral Processing
语种	英语
出版者	PERGAMON-ELSEVIER SCIENCE LTD
WOS记录号	WOS:000519534500001
内容类型	期刊论文
源URL	[http://119.78.100.198/handle/2S6PX9GI/23773]
专题	中科院武汉岩土力学所
通讯作者	Hu, Dawei
作者单位	1.China Nucl Power Engn Co Ltd, Beijing 100840, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, 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	Ding, Changdong,Hu, Dawei,Zhou, Hui,et al. Investigations of P-Wave velocity, mechanical behavior and thermal properties of anisotropic slate[J]. INTERNATIONAL JOURNAL OF ROCK MECHANICS AND MINING SCIENCES,2020,127:13.
APA	Ding, Changdong,Hu, Dawei,Zhou, Hui,Lu, Jingjing,&Lv, Tao.(2020).Investigations of P-Wave velocity, mechanical behavior and thermal properties of anisotropic slate.INTERNATIONAL JOURNAL OF ROCK MECHANICS AND MINING SCIENCES,127,13.
MLA	Ding, Changdong,et al."Investigations of P-Wave velocity, mechanical behavior and thermal properties of anisotropic slate".INTERNATIONAL JOURNAL OF ROCK MECHANICS AND MINING SCIENCES 127(2020):13.