Mechanical behavior and particle breakage of tailings under high confining pressure

doi:10.1016/j.enggeo.2019.105419

	Mechanical behavior and particle breakage of tailings under high confining pressure
	Zhang, Chao 1,3; Chen, Qinglin 2; Pan, Zhenkai 3; Ma, Changkun 3
刊名	ENGINEERING GEOLOGY
	2020-02-01
卷号	265 页码:11
关键词	Tailings High pressure Shear strength Constitutive theory Particle breakage Breakage index
ISSN号	0013-7952
DOI	10.1016/j.enggeo.2019.105419
英文摘要	The mechanical behavior and particle breakage of tailings under high confining pressure are the theoretical reference to analyze the stability of high tailings dams. Consolidated drained (CD) triaxial compression tests were carried out using a high-pressure triaxial apparatus. The strength and deformation characteristics of tailings were studied. The constitutive relation of tailings was deduced under high confining pressure. The particle breakage of tailings was analyzed qualitatively and quantitatively. The tailings exhibit strain-softening under low confining pressure and strain-hardening under high confining pressure. A modified hyperbolic model was deduced to describe the stress-strain behavior under high confining pressure. Under high confining pressure the volumetric strain always decreases with an increase in axial strain. Under low confining pressure, only a few indentations are observed on the surface of marked calcite particles. By contrast, a lot of indentations are observed on the surface of marked calcite particles under the high confining pressure. The number of broken particles increases with an increase in the confining pressure, but the increasing tendency gradually decreases.
资助项目	National Key Research and Development Program of China[2017YFC0804601] ; National Key Research and Development Program of China[2018YFC0808403] ; National Natural Science Foundation of China[51741410] ; Natural Science Foundation for Innovation Group of Hubei Province, China[2016CFA014] ; National Natural Science Foundation of China Innovative Research Team[51621006]
WOS研究方向	Engineering ; Geology
语种	英语
出版者	ELSEVIER
WOS记录号	WOS:000517660100019
内容类型	期刊论文
源URL	[http://119.78.100.198/handle/2S6PX9GI/23544]
专题	中科院武汉岩土力学所
通讯作者	Chen, Qinglin
作者单位	1.Chinese Acad Sci, Inst Rock & Soil Mech, Hubei Key Lab Environm Geotechnol, Wuhan 430071, Peoples R China 2.Chongqing Univ, Sch Resources & Safety Engn, State Key Lab Coal Mine Disaster Dynam & Control, Chongqing 400044, 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	Zhang, Chao,Chen, Qinglin,Pan, Zhenkai,et al. Mechanical behavior and particle breakage of tailings under high confining pressure[J]. ENGINEERING GEOLOGY,2020,265:11.
APA	Zhang, Chao,Chen, Qinglin,Pan, Zhenkai,&Ma, Changkun.(2020).Mechanical behavior and particle breakage of tailings under high confining pressure.ENGINEERING GEOLOGY,265,11.
MLA	Zhang, Chao,et al."Mechanical behavior and particle breakage of tailings under high confining pressure".ENGINEERING GEOLOGY 265(2020):11.