Integration of a subsidence model and SAR interferometry for a coal mine subsidence hazard map in Taebaek, Korea
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Title
- Integration of a subsidence model and SAR interferometry for a coal mine subsidence hazard map in Taebaek, Korea
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Author(s)
- Choi, Jong-Kuk; Won, Joong-Sun; Lee, Saro; Kim, Sang-Wan; Kim, Ki-Dong; Jung, Hyung-Sup
- KIOST Author(s)
- Choi, Jong Kuk(최종국)
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Alternative Author(s)
- 최종국
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Publication Year
- 2011
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Abstract
- Coal mine subsidence hazard can be effectively evaluated by geographic information system (GIS) analysis if sufficient data is provided. It is, however, difficult to obtain ground-based data, especially in remote and less populated mining areas. In this study, we construct and validate a coal mine subsidence hazard map in Taebaek, Korea, by integration of space-borne L-band synthetic aperture radar (SAR) measurements and a fuzzy-based subsidence model. There is an approximately 15-year time interval between the radar measurements used for the subsidence hazard model and those used to validate the subsidence. A subsidence hazard map was constructed using Japanese Earth Resources Satellite (JERS-1) SAR data from the early 1990s and the subsidence model. For the coal mine subsidence hazard mapping, a certainty factor analysis was used to estimate the relative weights of four control factors influencing coal mine subsidence, and the relative weight of each factor was then integrated to produce a subsidence hazard index by a fuzzy combination operator. The predicted hazard areas were then investigated and validated by comparison with subsidence occurrences observed by Advanced Land Observing Satellite Phased Array type L-band Synthetic Aperture Radar (ALOS PALSAR) interferometry in 2007-2008. The results showed a good agreement between the predicted locations vulnerable to subsidence and the actual subsidence occurrences with a prediction accuracy of about 73% and a root mean square error of about 0.35. These results demonstrate that a map produced by integration of a subsidence model and SAR interferometry can be used to predict and monitor coal mine subsidence hazards, especially in remote regions.
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ISSN
- 0143-1161
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URI
- https://sciwatch.kiost.ac.kr/handle/2020.kiost/3967
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DOI
- 10.1080/01431161.2010.532827
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Bibliographic Citation
- INTERNATIONAL JOURNAL OF REMOTE SENSING, v.32, no.23, pp.8161 - 8181, 2011
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Publisher
- TAYLOR & FRANCIS LTD
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Subject
- LANDSLIDE SUSCEPTIBILITY; GROUND SUBSIDENCE; RADAR INTERFEROMETRY; MINING SUBSIDENCE; AREA; GIS; INTERFEROGRAMS
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Type
- Article
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Language
- English
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Document Type
- Article
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