• 제목/요약/키워드: Geoscience

검색결과 2,779건 처리시간 0.035초

도로터널공사구간의 폐갱도 정밀조사 및 터널의 안정성 평가 (Site Investigation of Abandoned Coal Mine and Stability of Road Tunnel)

  • 신희순;김중열;이병주;한공창;선우춘;송원경;신중호;김유성;박찬
    • 한국지반공학회:학술대회논문집
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    • 한국지반공학회 2001년도 봄 학술발표회 논문집
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    • pp.17-24
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    • 2001
  • 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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An integrated studies for salt-water intrusion in Yeonggwang-gun, Korea

  • Hwang Seho;Chi Sejung;Lee Won-suk;Shin Jehyun;Park Inhwa;Huh Dae-Gee;Lee Sang-kyu
    • 한국지구물리탐사학회:학술대회논문집
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    • 한국지구물리탐사학회 2003년도 Proceedings of the international symposium on the fusion technology
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    • pp.455-458
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    • 2003
  • A combination of drilling, hydrogeochemical survey, geophysical survey and the numerical modelling for the flow and transport of groundwater was performed to evaluate the seawater intrusion in Baeksu-eup, Yeonggwang-gun, Korea. The survey area extends to over 24 $km^2$. Twelve wells were also drilled for the collection of geologic, geochemical, hydrologic, and geophysical logging data to delineate the degree and vertical extent of seawater intrusion. To evaluate and map the salinity in a coastal aquifer, geophysical data and hydrogeochemical results were used. Layer parameters derived from VES data, various in situ physical properties from geophysical well loggings, and the estimated equivalent NaCl concentration were used as the useful input parameters for the numerical simulation with density-dependent flow. Our multidisciplinary approach for evaluating the seawater intrusion can be considered as a valuable attempt to enhancing the utilization of various data and the reliability of numerical ground modelling.

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가스하이드레이트 형성 과정의 비저항 모니터링 (Electrical Resistivity Monitoring of Gas Hydrate Formation)

  • 이주용;이재형;이대성;이원석;김세준;허대기;김현태
    • 한국신재생에너지학회:학술대회논문집
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    • 한국신재생에너지학회 2008년도 추계학술대회 논문집
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    • pp.186-187
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    • 2008
  • Electrical resistivity in hydrate-bearing sediments is sensitive to porosity, gas hydrate saturation, gas content, pore fluid composition, and temperature, so electrical measurements such as well logs and electromagnetic surveys have been used to explore gas hydrate-bearing formation. The high pressure tomography cell is designed considering the effect of electrode configuration and electrical shielding on tomography measurements and the safety. The evolution of electrical conductivity during $CO_2$ hydrate formation and dissociation reflects the combined effects of concurrent changes that include ionization of dissolved $CO_2$, temperature-dependent ionic mobility, changes in the degree of saturation, ion exclusion, surface conduction, and porosity changes. Measurements during hydrate formation and dissociation require careful analysis to properly interpret signatures, in particular when out-of plane conductivity anomalies prevail.

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지질조사 및 광물자원탐사를 위한 KIGAM 드론 플랫폼 구축 (Development of a Drone Platform by KIGAM for Geological Surveys and Mineral Resource Exploration)

  • 방은석;손정술;강웅;이희욱;김창렬;이창원;김보나;황세호;노상건;손영선;조성준
    • 지구물리와물리탐사
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    • 제23권3호
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    • pp.141-148
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    • 2020
  • 한국지질자원연구원에서 구축하고 있는 드론 플랫폼을 소개하였다. 구축중인 플랫폼은 사진측량, 원격탐사, 물리탐사 등을 위한 다양한 드론 시스템과 현장에서 각 시스템을 운용하기 위한 방안과 차량형 드론관제센터, 그리고 취득한 자료의 저장, 공유, 분석, 시각화 등을 위한 드론 데이터 플랫폼 등으로 구성된다. 구축한 드론 시스템의 개별적 적용 또는 복합적 적용을 통해 획득한 결과들로부터 그 성능을 검증하였으며 지질조사 및 광물자원탐사를 위한 KIGAM 드론 플랫폼의 활용 가능성에 대해 고찰하였다.