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http://dx.doi.org/10.9720/kseg.2014.3.373

Analysis of Magnitude and Behavior of Rockfall for Volcanic Rocks in Ulleung-Do  

Moon, Gi-Bong (Department of Earth and Environmental Sciences, Chungbuk National University)
You, Young-Min (Pyonghwa Geotec Co. Ltd.)
Yun, Hyun-Seok (Department of Earth and Environmental Sciences, Chungbuk National University)
Suh, Young-Ho (Hyundai Engineering & Construction)
Seo, Yong-Seok (Department of Earth and Environmental Sciences, Chungbuk National University)
Baek, Yong (Geotechnical Engineering Research Division, Korea Institute of Construction Technology)
Publication Information
The Journal of Engineering Geology / v.24, no.3, 2014 , pp. 373-381 More about this Journal
Abstract
It is difficult to predict the magnitude of a rockfall with respect to the shape, volume, and weight of the rock mass, as a rockfall exhibits erratic behavior that depends on the slope geometry, such as the height and dip of the slope. In this study, a field survey was conducted on the slopes of Ulleung-Do, South Korea, where rockfalls frequently occur along coastal roads, to classify the mode of rockfalls and estimate their magnitude. This study also analyzed the effects of rockfall behavior on roads by applying a simulation technique. Agglomerate and trachytic rocks distributed across the study area produce rockfalls in a differential weathering rockfall mode and a toppling rockfall mode. In terms of rockfall weight, trachytic rockfalls were 2-3 times heavier than agglomerate rockfalls. An analysis of rockfall behavior from the simulation indicates that the impact energy on the road exceeded the absorbing energy of a standard rockfall protection fence; however, the rockfall was secured when a ring-net was applied.
Keywords
volcanic bomb; trachytic rock; rockfall magnitude; simulation; protection measure;
Citations & Related Records
Times Cited By KSCI : 3  (Citation Analysis)
연도 인용수 순위
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