Study on Characteristics of In-situ Rock Stress State in Mountainous Region by Hydraulic Fracturing Method

수압파쇄시험에 의한 산악지역에서의 현지 암반 초기응력 측정 및 분포특성 연구

  • 배성호 ((주)지오제니 컨설턴트) ;
  • 전석원 (서울대학교 지구환경시스템공학부) ;
  • 최용근 ((주)지오제니 컨설턴트) ;
  • 김학수 ((주)지오제니 컨설턴트)
  • Published : 2002.03.01

Abstract

Since early in the 90's, the need for construction of underground rock structures such as long and large section traffic tunnel, energy storage cavern, industrial facility, etc. has been largely increased because the Korean territory is not wide and about 65 % of the land consists of mountainous region. The initial rock stress measurement has been widely conducted to provide the quantitative information on the stress state of engineering site at the design stage of underground rock structures. Among the diverse methods developed for measuring rock stress, hydraulic fracturing test is most popularly used because it is applicable at pre-construction stage and has no limit in testing depth. In this paper, the characteristics of initial rock stress state in mountainous region were studied on the basis of the in-situ hydraulic fracturing stress measurement results from the 60 test boreholes in various parts of Korea.