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Prediction of Ground Subsidence Hazard Area Using GIS and Probability Model near Abandoned Underground Coal Mine  

Choi, Jong-Kuk (Department of Earth System Sciences, Yonsei University)
Kim, Ki-Dong (Geohazard information Laboratory, Department of Geoinformation Engineering Sejong University)
Lee, Sa-Ro (National Geoscience Information Center Korea Institute of Geoscience and Mineral Resources)
Kim, Il-Soo (Korea National Oil Corporation)
Won, Joong-Sun (Department of Earth System Sciences, Yonsei University)
Publication Information
Economic and Environmental Geology / v.40, no.3, 2007 , pp. 295-306 More about this Journal
Abstract
In this study, we predicted areas vulnerable to ground subsidence near abandoned underground coal mine at Sam-cheok City in Korea using a probability (frequency ratio) model with Geographic Information System (GIS). To extract the factors related to ground subsidence, a spatial database was constructed from a topographical map, geo-logical map, mining tunnel map, land characteristic map, and borehole data on the study area including subsidence sites surveyed in 2000. Eight major factors were extracted from the spatial analysis and the probability analysis of the surveyed ground subsidence sites. We have calculated the decision coefficient ($R^2$) to find out the relationship between eight factors and the occurrence of ground subsidence. The frequency ratio model was applied to deter-mine each factor's relative rating, then the ratings were overlaid for ground subsidence hazard mapping. The ground subsidence hazard map was then verified and compared with the surveyed ground subsidence sites. The results of verification showed high accuracy of 96.05% between the predicted hazard map and the actual ground subsidence sites. Therefore, the quantitative analysis of ground subsidence near abandoned underground coal mine would be possible with a frequency ratio model and a GIS.
Keywords
Ground subsidence; Abandoned underground coal mine; Frequency ratio model; Decision coefficient; GIS;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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