Stability prediction and analysis for large underground cavern controlled by weak interlayer zone under high geostress

doi:10.1088/1755-1315/861/4/042014

	Stability prediction and analysis for large underground cavern controlled by weak interlayer zone under high geostress
	Duan,Shuqian 3,4; Liu,Guofeng 2; Gao,Po 4; Sun,Yuanda 4; Xu,Laibiao 4; Cao,Bei 1; Jiang,Quan 3
刊名	IOP Conference Series: Earth and Environmental Science
	2021-10-01
卷号	861 期号:4
关键词	Large underground cavern Weak interlayer zone Constitutive model Rock failure index High geostress
ISSN号	1755-1307
DOI	10.1088/1755-1315/861/4/042014
英文摘要	Abstract Due to the special engineering geological characteristics of weak interlayer zone (WIZ) with the initial shear, the pre-consolidation, the water softening and clay generation, that occurs between different rock strata (e.g., tuff and basalt), it tends to represent potential threats to the overall stability of large underground cavern under high geostress, such as the large deformation of upper and lower rock masses, structural stress-induced collapse and the time-dependent plastic squeezing-out failure, which could never be neglected, and requires more widespread concern. Focusing on the prediction and analysis of such stability issues induced by WIZ, a novel constitutive model for WIZ, based on the unearthed macro-meso mechanical response of WIZ under complicated unloading stress paths, has been first established, and well embed into the effective numerical calculation platform, to realize the quantitative descriptions of the mechanical effects of stress path, the particle breakage as well as the mechanical parameter evolution of WIZ. Then the rock failure index for WIZ (RFDwiz) was derivated, to help determine the cracking scale, depth and degree of surrounding rock masses with WIZ. Based on the proposed model, the RFDwiz and the cracking-restraint design method, the prediction of the failure position and degree, as well as the dynamic optimization design of the reasonable supporting parameters of rock masses with WIZ in underground cavern, were ultimately realized. This study will provide theoretical basis for the analysis and prediction of the instability of deep underground projects controlled by rock masses with WIZ.
语种	英语
出版者	IOP Publishing
WOS记录号	IOP:EES_861_4_042014
内容类型	期刊论文
源URL	[http://119.78.100.198/handle/2S6PX9GI/28434]
专题	中科院武汉岩土力学所
作者单位	1.Sha anxi Public Resources Trading Center, Xi’an, Shaanxi, 710000 2.School of Highway, Chang’an University, Xi’an 710064, China 3.State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan, Hubei, 430071, China 4.School of Civil Engineering, Zhengzhou University, Zhengzhou, Henan 450001, China
推荐引用方式 GB/T 7714	Duan,Shuqian,Liu,Guofeng,Gao,Po,et al. Stability prediction and analysis for large underground cavern controlled by weak interlayer zone under high geostress[J]. IOP Conference Series: Earth and Environmental Science,2021,861(4).
APA	Duan,Shuqian.,Liu,Guofeng.,Gao,Po.,Sun,Yuanda.,Xu,Laibiao.,...&Jiang,Quan.(2021).Stability prediction and analysis for large underground cavern controlled by weak interlayer zone under high geostress.IOP Conference Series: Earth and Environmental Science,861(4).
MLA	Duan,Shuqian,et al."Stability prediction and analysis for large underground cavern controlled by weak interlayer zone under high geostress".IOP Conference Series: Earth and Environmental Science 861.4(2021).