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http://dx.doi.org/10.9720/kseg.2015.2.251

Analysis of Scale and Shape of Limestone Cavities using Borehole Drilling and Geophysical Investigations  

Song, Gyu-Jin (Department of Earth and Environmental Sciences, Chungbuk National University)
Yun, Hyun-Seok (Department of Earth and Environmental Sciences, Chungbuk National University)
Jang, Il-Ho (JS Eng Co., Ltd.)
Choi, Yong-Seok (Groundwater and Geological Technology Department, Chungbuk Regional Headquarter, Korea Rural Community Corporation)
Seo, Yong-Seok (Department of Earth and Environmental Sciences, Chungbuk National University)
Publication Information
The Journal of Engineering Geology / v.25, no.2, 2015 , pp. 251-263 More about this Journal
Abstract
Geological mapping, borehole drilling, electrical resistivity, and seismic tomography surveys were conducted in order to map underground cavities and better understand the mechanisms driving subsidence in a limestone region in Korea. Limestone outcrops in the study area generally alternate between calcite-rich and calcite-poor rock. The results reveal that in areas experiencing subsidence, cavities occur mainly around soil-rock boundaries at depths of 7~14 m. These results are based on comparative analyses of electrical resistivity, seismic tomography, and borehole logging data. The volumes of the cavities are relatively small in a range of 558~835 ㎥ and they have a shape typical of suffosion sinkholes, which are typically found where sandy soils overlie bedrock cavities.
Keywords
volume of limestone cavities; subsidence; borehole drilling; electrical resistivity survey; seismic tomography survey;
Citations & Related Records
Times Cited By KSCI : 7  (Citation Analysis)
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