Economic and Environmental Geology (자원환경지질)

The Korean Society of Economic and Environmental Geology (대한자원환경지질학회)
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A Study on Thermal Properties of Rocks from Gyeonggi-do Gangwon-do, Chungchung-do, Korea

경기도, 강원도, 충청도 일대의 암석 열물성 특성 연구

  • Park, Jeong-Min (Chungnam National University) ;
  • Kim, Hyoung-Chan (Groundwater and Geothermal Resources Division, Korea Institute of Geoscience and Mineral Resources) ;
  • Lee, Young-Min (Groundwater and Geothermal Resources Division, Korea Institute of Geoscience and Mineral Resources) ;
  • Song, Moo-Young (Chungnam National University)
  • 박정민 (충남대학교) ;
  • 김형찬 (한국지질자원연구원 지하수지열연구부) ;
  • 이영민 (한국지질자원연구원 지하수지열연구부) ;
  • 송무영 (충남대학교)
  • Published : 2007.12.28
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Abstract

We made 712 thermal property measurements on igneous, metamorphic and sedimentary rock samples from Gyeonggi-do, Gangwon-do and Chungchung-do, Korea. The average thermal conductivities of igneous, metamorphic and sedimentary rocks are 3.58W/m-K, 4.16W/m-K and 4.53W/m-K, respectively. Thermal conductivity of granite and gneiss are 2.13-5.87W/m-K and 2.26-6.67W/m-K, with average values of 3.57W/m-K and 3.945W/m-K, respectively. The average of thermal diffusivities are $1.43mm^2/sec\;and\;1.55mm^2/sec$, respectively; the average of specific heat values are 0.914J/gK, 0.912J/gK for granite and gneiss samples, respectively. The thermal conductivity of a rock type generally have a wide range because it depends on various factors such as dominant mineral phase, micro-structure, anisotropy, and so on.

경기도, 강원도, 충청도 일대에서 화성암, 변성암, 퇴적암의 총 712개의 암석을 채취하여 열물성을 측정하였다. 측정 결과로 화성암의 평균 열전도도는 3.58W/m-K, 변성암은 4.16W/m-K, 퇴적암은 4.53W/m-K이다. 우리나라의 경우 화강암과 편마암이 주를 이루고 있는데 이에 대한 열물성 값을 보면 화강암의 열전도도는 2.13-5.87W/m-K의 범위를 가지며, 평균 열전도도는 3.57W/m-K, 편마암은 2.26-6.67W/m-K의 범위를 가지며, 평균 열전도도는 3.945W/m-K이다. 화강암의 평균 열확산율은 $1.43mm^2/sec$, 비열은 0.914J/gK, 편마암의 평균 열확산율은 $1.55mm^2/sec$, 비열은 0.912J/gK로 나타났다. 일반적으로 같은 암석의 열전도도 값의 범위가 큰 이유는 암석의 구성광물, 이방성 등에 영향을 받기 때문이다.

Keywords

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