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Mechanism of Strain Burst by Laboratory and Numerical Analysis
He, Manchao1; Ren, Fuqiang1,2; Cheng, Cheng3
2018
发表期刊SHOCK AND VIBRATION
ISSN1070-9622
页码15
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.
DOI10.1155/2018/8940798
资助者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
关键词[WOS]BONDED-PARTICLE MODEL ; ENERGY-RELEASE ; ROCK MECHANICS ; SIMULATION ; ROCKBURSTS ; CRITERIA
语种英语
资助项目National Key Research and Development Program[2016YFC0600901] ; National Natural Science Foundation of China[51704298]
资助者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
WOS研究方向Acoustics ; Engineering ; Mechanics
WOS类目Acoustics ; Engineering, Mechanical ; Mechanics
WOS记录号WOS:000449184400001
出版者HINDAWI LTD
引用统计
文献类型期刊论文
条目标识符http://ir.iggcas.ac.cn/handle/132A11/89156
专题其他部门
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.
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