气候变化领域集成服务门户(CCPortal): Energy Budget and Fast Rupture on a Near-Excavation Fault: Implications for Mitigating Induced Seismicity

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DOI	10.1029/2020JB019360
	Energy Budget and Fast Rupture on a Near-Excavation Fault: Implications for Mitigating Induced Seismicity
	Yang J.; Yang D.; Zhang X.; Jeffrey R.G.; Chen W.; Sheng Q.; Zhang F.
发表日期	2020
ISSN	21699313
卷号	125 期号:10
英文摘要	Reducing seismicity during excavation is a challenge faced by mining and the associated slip development on a near-excavation fault under deep-mining stress conditions is considered as an analog for understanding earthquake initiation mechanisms. In this paper, the quasi-static slipping on a dipping fault near a horizontal tunnel was numerically studied by incrementally increasing horizontal stress. The equilibrium of the fault, which obeys a slip-weakening friction law, is formulated by a boundary integral approach. The calculated rupture size is a function of the dimensionless factors derived by scaling from geometrical, loading, and friction conditions. The results show that the rupture becomes runaway at a critical stress level and prior to this, the slip zone either extends continuously and aseismically or experiences finite rapid extensions. Energy dissipated in friction in the presence of tunnel-induced stress heterogeneity can arrest fast rupture events resulting in regained equilibrium. The energy radiated from arrested events, using an energy budget analysis, depends on the resulting fault strength change, the rupture arrest length, and the strain energy change during the event. These preceding energy radiations can mitigate the magnitude of runaway events. As the critical slip-weakening distance decreases, the critical stresses for nucleation of both runaway and arrested events are reduced, but the energy radiated by arrested events does not always decrease because the rupture arrest length varies. The results of this study may help identify the initiation mechanisms for runaway ruptures and assess the seismic potential of a rock mass during excavation. ©2020. American Geophysical Union. All Rights Reserved.
英文关键词	arrested events; critical slip-weakening distance; energy budget; excavation tunnel; mining-induced seismicity
语种	英语
来源期刊	Journal of Geophysical Research: Solid Earth
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/187551
作者单位	State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil mechanics, Chinese Academy of Sciences, Wuhan, China; School of Engineering Science, University of Chinese Academy of Sciences, Beijing, China; CSIRO Energy, Melbourne, Australia; SCT Operations Pty Ltd, Wollongong, Australia; Research Center of Geotechnical and Structural Engineering, Shandong University, Jinan, China; Department of Geotechnical Engineering, Tongji University, Shanghai, China
推荐引用方式 GB/T 7714	Yang J.,Yang D.,Zhang X.,et al. Energy Budget and Fast Rupture on a Near-Excavation Fault: Implications for Mitigating Induced Seismicity[J],2020,125(10).
APA	Yang J..,Yang D..,Zhang X..,Jeffrey R.G..,Chen W..,...&Zhang F..(2020).Energy Budget and Fast Rupture on a Near-Excavation Fault: Implications for Mitigating Induced Seismicity.Journal of Geophysical Research: Solid Earth,125(10).
MLA	Yang J.,et al."Energy Budget and Fast Rupture on a Near-Excavation Fault: Implications for Mitigating Induced Seismicity".Journal of Geophysical Research: Solid Earth 125.10(2020).