Influence of weak planes on rockburst occurrence

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 > 会议论文

	Influence of weak planes on rockburst occurrence
	Manouchehrian, Amin; Cai, Ming
	2016
会议日期	AUG 13-19, 2016
会议地点	McGill Univ, Montreal, CANADA
关键词	Numerical simulation excavation heterogeneity weak plane rockburst
页码	12-17
英文摘要	Geological structures such as faults, joints, and dykes have been observed near excavation boundaries in many rockburst case histories. In this paper, the role of weak planes around tunnels in rockburst occurrence was studied. The Abaqus-Explicit code was used to simulate dynamic rock failure in deep tunnels. Firstly, the tool's usefulness for modelling geomaterials was improved by introducing material heterogeneity using Python scripting. The modelling results showed that heterogeneous models resulted in more realistic failure modes than homogeneous models. Secondly, rock failure near the excavation boundary of a tunnel without any adjacent geological structure was modelled and released kinetic energy from rock due to failure and velocity of failed elements at the tunnel wall were calculated. Then, a weak plane was added to the model. This resulted in more released kinetic energy and higher element velocity, indicating that rock failure became more violent in the models with weak planes. The modelling results confirm that the presence of geological structures in the vicinity of deep excavations is a necessary condition for the occurrence of rockburst. It can be used to explain localized rockburst occurrence in civil tunnels and mining drifts. The methodology for rockburst analysis presented in this paper can be useful for rockburst anticipation and control during mining and tunneling in highly stressed grounds.
会议录	OPERATIONAL AND ENVIRONMENTAL MINE HEALTH AND SAFETY PRACTICE AND INNOVATION
会议录出版者	MCGILL UNIV
会议录出版地	MONTREAL
语种	英语
WOS研究方向	Mining & Mineral Processing
WOS记录号	WOS:000410525800003
内容类型	会议论文
源URL	[http://119.78.100.198/handle/2S6PX9GI/4906]
专题	岩土力学所知识全产出_会议论文国家重点实验室知识产出_会议论文
作者单位	Laurentian Univ, Bharti Sch Engn, Sudbury, ON P3E 2C6, Canada; Laurentian Univ; Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomechan & Geotech Engn
推荐引用方式 GB/T 7714	Manouchehrian, Amin,Cai, Ming. Influence of weak planes on rockburst occurrence[C]. 见:. McGill Univ, Montreal, CANADA. AUG 13-19, 2016.