Rock bridge fracture model and stability analysis of surrounding rock in underground cavern group

doi:10.12989/sem.2015.53.3.481

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

	Rock bridge fracture model and stability analysis of surrounding rock in underground cavern group
	Yu, Song 1,2; Zhu, Wei-shen 2,3; Yang, Wei-min 3; Zhang, Dun-fu 1; Ma, Qing-song 3
刊名	STRUCTURAL ENGINEERING AND MECHANICS
	2015
卷号	53 期号:3 页码:481-495
关键词	underground cavern group splitting failure damage evolution equation numerical analysis field monitoring
ISSN号	1225-4568
DOI	10.12989/sem.2015.53.3.481
英文摘要	Many hydropower stations in southwest China are located in regions of brittle rock mass with high geo-stresses. Under these conditions deep fractured zones often occur in the sidewalls of the underground caverns of a power station. The theory and methods of fracture and damage mechanics are therefore adopted to study the phenomena. First a flexibility matrix is developed to describe initial geometric imperfections of a jointed rock mass. This model takes into account the area and orientation of the fractured surfaces of multiple joint sets, as well as spacing and density of joints. Using the assumption of the equivalent strain principle, a damage constitutive model is established based on the brittle fracture criterion. In addition the theory of fracture mechanics is applied to analyze the occurrence of secondary cracks during a cavern excavation. The failure criterion, for rock bridge coalescence and the damage evolution equation, has been derived and a new sub-program integrated into the FLAC-3D software. The model has then been applied to the stability analysis of an underground cavern group of a hydropower station in Sichuan province, China. The results of this method are compared with those obtained by using a conventional elasto-plastic model and splitting depth calculated by the splitting failure criterion proposed in a previous study. The results are also compared with the depth of the relaxation and fracture zone in the surrounding rock measured by field monitoring. The distribution of the splitting zone obtained both by the proposed model and by the field monitoring measurements are consistent to the validity of the theory developed herein.
WOS研究方向	Engineering
语种	英语
出版者	TECHNO-PRESS
WOS记录号	WOS:000352200300006
内容类型	期刊论文
源URL	[http://119.78.100.198/handle/2S6PX9GI/3687]
专题	岩土力学所知识全产出_期刊论文国家重点实验室知识产出_期刊论文
作者单位	1.Shandong Univ, Sch Civil Engn ; 2.Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn ; 3.Shandong Univ, Geotech & Struct Engn Res Ctr
推荐引用方式 GB/T 7714	Yu, Song,Zhu, Wei-shen,Yang, Wei-min,et al. Rock bridge fracture model and stability analysis of surrounding rock in underground cavern group[J]. STRUCTURAL ENGINEERING AND MECHANICS,2015,53(3):481-495.
APA	Yu, Song,Zhu, Wei-shen,Yang, Wei-min,Zhang, Dun-fu,&Ma, Qing-song.(2015).Rock bridge fracture model and stability analysis of surrounding rock in underground cavern group.STRUCTURAL ENGINEERING AND MECHANICS,53(3),481-495.
MLA	Yu, Song,et al."Rock bridge fracture model and stability analysis of surrounding rock in underground cavern group".STRUCTURAL ENGINEERING AND MECHANICS 53.3(2015):481-495.