지구물리와물리탐사 (Geophysics and Geophysical Exploration)

  • 제20권2호
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  • Pages.100-113
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  • 2017
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  • 1229-1064(pISSN)
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  • 2384-051X(eISSN)
한국지구물리·물리탐사학회 (Korean Society of Earth and Exploration Geophysicists)
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유도분극 탐사의 원리 및 활용

The Principles and Practice of Induced Polarization Method

  • Kim, Bitnarae (Department of Energy & Mineral Resources Engineering, Sejong University) ;
  • Nam, Myung Jin (Department of Energy & Mineral Resources Engineering, Sejong University) ;
  • Jang, Hannuree (Department of Energy & Mineral Resources Engineering, Sejong University) ;
  • Jang, Hangilro (Department of Energy & Mineral Resources Engineering, Sejong University) ;
  • Son, Jeong-Sul (Korea Institute of Geoscience and Mineral Resources,) ;
  • Kim, Hee Jun (Department of Energy Resources Engineering, Pukyong National University)
  • 투고 : 2017.03.09
  • 심사 : 2017.05.27
  • 발행 : 2017.05.31
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⟨ 이전 논문 다음 논문 ⟩

초록

유도분극(induced polarization; IP) 탐사는 분극 현상으로 인해 매질에서 발생하는 과전압을 측정하는 전기전자 탐사법으로 주로 금속 광상을 찾을 때 사용되었으나 장비의 발전에 힘입어 최근에는 지하수, 환경 오염, 지반 등 여러 분야에서 다양하게 활용되고 있다. IP 탐사에는 충전율을 측정하는 시간영역 IP 탐사, 진동수 효과를 측정하는 진동수영역 IP 탐사, 그리고 복소수 전기비저항을 측정하는 복소 전기비저항 탐사와 광대역 IP (spectral IP; SIP) 탐사 등이 있다. 또한, 최근에는 전극 형태의 측정 방법의 단점을 보완하기 위해 전자기 유도에 기초한 IP 법도 개발되어 지속적으로 연구가 진행되고 있다. 다양한 IP 탐사법에 대한 체계적인 이해를 돕기 위해 이 논문에서는 1) 송신원 형태와 측정 자료를 기준으로 IP 탐사법을 분류하고 이들에 대한 개념 정리와 함께 2) 각 탐사법의 수치 모델링 및 역산 알고리듬 발전 과정을 자세히 기술하고 3) 마지막으로 IP 탐사의 다양한 현장 활용 사례를 소개하고자 한다.

Induced polarization (IP) method is based on the measurement of a polarization effect known as overvoltage of the ground. IP techniques have been usually used to find mineral deposits, however, nowadays widely applied to hydrogeological investigations, surveys of groundwater pollution and foundation studies on construction sites. IP surveys can be classified by its source type, i.e., time-domain IP estimating chargeability, frequency-domain IP measuring frequency effect (FE), and complex resistivity (CR) and spectral IP (SIP) measuring complex resistivity. Recently, electromagnetic-based IP has been studied to avoid the requirement for spike electrodes to be placed in the ground. In order to understand IP methods in this study, we: 1) classify IP surveys by source type and measured data and illustrate their basic theories, 2) describe historical development of each IP forward modeling and inversion algorithm, and finally 3) introduce various case studies of IP measurements.

키워드

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