Mechanism of Strain Burst by Laboratory and Numerical Analysis

doi:10.1155/2018/8940798

CORC > 地质与地球物理研究所 > 中国科学院地质与地球物理研究所 > 其他部门

	Mechanism of Strain Burst by Laboratory and Numerical Analysis
	He, Manchao 1; Ren, Fuqiang 1,2; Cheng, Cheng 3
刊名	SHOCK AND VIBRATION
	2018
页码	15
ISSN号	1070-9622
DOI	10.1155/2018/8940798
英文摘要	Strain burst is often considered to be a type of failure related to brittle rock material; therefore, many studies on strain burst focus on the brittleness of rock. However, the laboratory experiments show that strain burst can not only occur in hard brittle rock-like granite but also in the relatively ductile rock-like argillaceous sandstone. This result proves that behavior of rock material is not the only factor influencing the occurrence of strain burst. What must also be considered is the relative stiffness between the excavation wall/ore body and the surrounding rock mass. In order to further studying the mechanism of strain burst considering the whole system, the engineering geomechanial model and numerical model of strain burst due to excavation are built, respectively. In a series of numerical tests, the rock mass involving the excavation wall as well as roof and floor is biaxially loaded to the in situ stress state before one side of the excavation wall is unloaded abruptly to simulate the excavation in the field. With various system stiffness determined by the microproperties including the contact moduli of particles and parallel bond moduli in the models of roof and floor, the different failure characteristics are obtained. Based on the failure phenomenon, deformation, and released energy from the roof and floor, this study proves that the system stiffness is a key factor determining the violence of the failure, and strain burst is prone to happen when the system is soft. Two critical Young's moduli ratios and stiffness ratios are identified to assess the violence of failure.
资助项目	National Key Research and Development Program[2016YFC0600901] ; National Natural Science Foundation of China[51704298]
WOS关键词	BONDED-PARTICLE MODEL ; ENERGY-RELEASE ; ROCK MECHANICS ; SIMULATION ; ROCKBURSTS ; CRITERIA
WOS研究方向	Acoustics ; Engineering ; Mechanics
语种	英语
出版者	HINDAWI LTD
WOS记录号	WOS:000449184400001
资助机构	National Key Research and Development Program ; National Key Research and Development Program ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Key Research and Development Program ; National Key Research and Development Program ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Key Research and Development Program ; National Key Research and Development Program ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Key Research and Development Program ; National Key Research and Development Program ; National Natural Science Foundation of China ; National Natural Science Foundation of China
内容类型	期刊论文
源URL	[http://ir.iggcas.ac.cn/handle/132A11/89156]
专题	地质与地球物理研究所_其他部门
通讯作者	Ren, Fuqiang
作者单位	1.State Key Lab Geomech & Deep Underground Engn, Beijing 100083, Peoples R China 2.China Univ Min & Technol, Sch Mech & Civil Engn, Beijing 100083, Peoples R China 3.Chinese Acad Sci, Inst Geol & Geophys, Beijing 100029, Peoples R China
推荐引用方式 GB/T 7714	He, Manchao,Ren, Fuqiang,Cheng, Cheng. Mechanism of Strain Burst by Laboratory and Numerical Analysis[J]. SHOCK AND VIBRATION,2018:15.
APA	He, Manchao,Ren, Fuqiang,&Cheng, Cheng.(2018).Mechanism of Strain Burst by Laboratory and Numerical Analysis.SHOCK AND VIBRATION,15.
MLA	He, Manchao,et al."Mechanism of Strain Burst by Laboratory and Numerical Analysis".SHOCK AND VIBRATION (2018):15.