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Experimental Study of Thermal-mechanical Influence on the Hydraulic Properties of Rock  

전석원 (서울대학교 지구환경시스템공학부)
홍창우 (서울대학교 지구환경시스템공학부)
이주현 (전국경제인연합회 조사본부)
강주명 (서울대학교 지구환경시스템공학부)
배대석 (한국원자력연구소)
Publication Information
Journal of the Korean Geotechnical Society / v.19, no.5, 2003 , pp. 59-67 More about this Journal
Abstract
In this study, the change in hydraulic conductivity according to the changes in the contact area, aperture, confining pressure and temperature was observed to improve the reliability of the analysis of underground water flow. Also, the mechanical and thermal properties of domestic crystalline rocks in a great depth were obtained. It was found that the averaged intial aperture ranged from 544.33${\mu}{\textrm}{m}$ to 898.62${\mu}{\textrm}{m}$ and it followed a log-normal distribution. The hydraulic conductivity decreased with the increase of normal stress on the fracture surface and the hydraulic conductivity decreased as temperature increased. The change in hydraulic conductivity was strongly correlated with the change in contact area. It was verified by experiments that hydraulic conductivity was inversely proportional to the contact area. The measured mechanical and thermal properties were very close to the existing typical properties of domestic granites.
Keywords
Aperture; Contact area; Hydraulic conductivity; THM coupling;
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