Proceedings of the Korean Geotechical Society Conference (한국지반공학회:학술대회논문집)

Korean Geotechnical Society (한국지반공학회)
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Site Investigation of Abandoned Coal Mine and Stability of Road Tunnel

도로터널공사구간의 폐갱도 정밀조사 및 터널의 안정성 평가

  • Shin, Hee-Soon (Korea Institute of Geoscience & Mineral Resources(KIGAM)) ;
  • Kim, Jung-Yul (Korea Institute of Geoscience & Mineral Resources(KIGAM)) ;
  • Lee, Byung-Joo (Korea Institute of Geoscience & Mineral Resources(KIGAM)) ;
  • Han, Kong-Chang (Korea Institute of Geoscience & Mineral Resources(KIGAM)) ;
  • Sunwoo, Choon (Korea Institute of Geoscience & Mineral Resources(KIGAM)) ;
  • Song, Won-Kyung (Korea Institute of Geoscience & Mineral Resources(KIGAM)) ;
  • Synn, Joong-Ho (Korea Institute of Geoscience & Mineral Resources(KIGAM)) ;
  • Kim, Yoo-Sung (Korea Institute of Geoscience & Mineral Resources(KIGAM)) ;
  • Park, Chan (Korea Institute of Geoscience & Mineral Resources(KIGAM))
  • Published : 2001.03.01
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Abstract

Several underground cavities were found during construction of a road tunnel in 600m length . The area belong to Whasoon coalfield where extensive ground subsidences have occurred. It is necessary to find other underground cavities which might be located just near the road tunnel for safety, The field surveys and laboratory tests were conducted such as surface geological survey(672m), surface reflection seismic exploration(399m), drilling test(3 NX holes), 9 laboratory tests for rocks, 3 boreholes televiewer tests, reflection seismic exploration in tunnel(2, 342m). To estimate the effects of underground cavities on the road tunnel, 3 geological section were analysed with FLAC-2D modeling. The effects of the ground reinforcement were also analysed.

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