Strength and deformation of tailings with fine-grained interlayers

doi:10.1016/j.enggeo.2019.04.007

CORC > 武汉岩土力学研究所 > 中科院武汉岩土力学所 > 岩土力学所知识全产出 > 期刊论文

	Strength and deformation of tailings with fine-grained interlayers
	Chen, Qinglin ; Zhang, Chao ; Yang, Chunhe ; Ma, Changkun ; Pan, Zhenkai ; Daemen, J. J. K.
刊名	ENGINEERING GEOLOGY
	2019
卷号	256 期号:-页码:110-120
关键词	Tailings Granular material Fine-grained interlayer Deformation patterns
ISSN号	0013-7952
DOI	10.1016/j.enggeo.2019.04.007
英文摘要	Due to the presence of fine-grained interlayer structures (usually called lenticles), the stabilities of tailings dams deteriorate. In this study, the strength and deformation of tailing samples containing fine-grained interlayers were studied by undrained tests. Based on the Coulomb theory, the slip mechanism of tailing samples was investigated. The results indicate that the stress-strain relationship of the samples that contain interlayers of large dip angles (i.e., 45 degrees or 60 degrees) is typical strain softening. The stress-strain relationship of the samples, with the interlayers dipping with small angles (i.e., 0 degrees or 15 degrees), is strain hardening. The mechanical parameters, e.g., shear strength, internal friction angle and cohesion, decrease with the increase in the dip angle of the interlayer. In tests, three different deformation patterns, i.e., bulging, slip and composite deformation, were observed from the samples with interlayers of small, large and medium dip angles, respectively (the medium dip angle is 30 degrees). The slip occurred along the interlayer plane of the samples. When the angle of the interlayer is near 60 degrees, the strength and deformation of the samples are controlled by the fine-grained interlayer. The findings of this study can provide reference for the stability evaluation of anisotropic tailing dams and other similar structures.
WOS研究方向	Engineering ; Geology
语种	英语
WOS记录号	WOS:000472690300008
内容类型	期刊论文
源URL	[http://119.78.100.198/handle/2S6PX9GI/14966]
专题	岩土力学所知识全产出_期刊论文
作者单位	1.Chongqing Univ, Coll Resources & Environm Sci, State Key Lab Coal Mine Disaster Dynam & Control, Chongqing 400044, Peoples R China; 2.Chinese Acad Sci, State Key Lab Geomech & Geotech Engn, Inst Rock & Soil Mech, Wuhan 430071, Hubei, Peoples R China; 3.Chinese Acad Sci, Inst Rock & Soil Mech, Hubei Key Lab Environm Geotechnol, Wuhan 430071, Hubei, Peoples R China; 4.Univ Nevada, Mackay Sch Earth Sci & Engn, Reno, NV 89557 USA
推荐引用方式 GB/T 7714	Chen, Qinglin,Zhang, Chao,Yang, Chunhe,et al. Strength and deformation of tailings with fine-grained interlayers[J]. ENGINEERING GEOLOGY,2019,256(-):110-120.
APA	Chen, Qinglin,Zhang, Chao,Yang, Chunhe,Ma, Changkun,Pan, Zhenkai,&Daemen, J. J. K..(2019).Strength and deformation of tailings with fine-grained interlayers.ENGINEERING GEOLOGY,256(-),110-120.
MLA	Chen, Qinglin,et al."Strength and deformation of tailings with fine-grained interlayers".ENGINEERING GEOLOGY 256.-(2019):110-120.