气候变化领域集成服务门户(CCPortal): Airblasts Caused by Large Slope Collapses

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DOI	10.1130/B35531.1
	Airblasts Caused by Large Slope Collapses
	Penna I.M.; Hermanns R.L.; Nicolet P.; Morken O.A.; Dehls J.; Gupta V.; Jaboyedoff M.
发表日期	2021
ISSN	167606
起始页码	939
结束页码	948
卷号	133
英文摘要	Large slope collapses have been known to trigger extreme rushes of air loaded with projectiles (airblasts) capable of causing destruction and fatalities far beyond run-out of the rock mass. An appraisal of the likelihood of a destructive airblast should be a component of landslide risk assessments. Yet there is an absence of risk studies directly examining landslide-related airblasts. In this work we back-analyze an unreported airblast in the Sikkim Himalayas (India) and several other airblasts documented around the world. We explore the conditions a large slope collapse should meet to trigger a significant airblast, and we establish a semiempirical relationship linking the potential energy in a collapse with airborne trajectory and the extent of the related airblast. The collapse of thousands or millions of cubic meters falling from a significant height results in a sudden release of energy (1011J to 1013J) and a high degree of comminution of rocks, causing a violent displacement of air. Average wind speeds of airblasts following impacts with airborne trajectory can be double the speed of rock avalanches. The size of the damage zone depends on the potential energy of the falling rock mass and can be amplified or reduced depending on how confined the valley is where the airblast occurs. © 2020 Geological Society of America
语种	英语
来源期刊	Bulletin of the Geological Society of America
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/184679
作者单位	Geological Survey of Norway, Leiv Eirikssons vei 39, Trondheim, 7040, Norway; Institute for Geosciences and Petroleum, Norwegian University for Science and Technology, Høgskoleringen 1, Trondheim, 7491, Norway; Wadia Institute of Himalayan Geology, General Mahadev Singh Rd 33, Vijay Park, Dehradun, Uttarakhand 248001, India; Institute of Earth Sciences, University of Lausanne, GEOPOLIS, Lausanne, 1015, Switzerland
推荐引用方式 GB/T 7714	Penna I.M.,Hermanns R.L.,Nicolet P.,et al. Airblasts Caused by Large Slope Collapses[J],2021,133.
APA	Penna I.M..,Hermanns R.L..,Nicolet P..,Morken O.A..,Dehls J..,...&Jaboyedoff M..(2021).Airblasts Caused by Large Slope Collapses.Bulletin of the Geological Society of America,133.
MLA	Penna I.M.,et al."Airblasts Caused by Large Slope Collapses".Bulletin of the Geological Society of America 133(2021).