Tunnel and Underground Space (터널과지하공간)

Korean Society for Rock Mechanics and Rock Engineering (한국암반공학회)
권호 표지

Estimation of in-situ Stresses and the Effect of a Preexisting Inclined Fracture by Hydraulic Fracturing

수압파쇄를 이용한 초기지압측정과 기존경사균열의 영향

  • 신중호 (한국자원연구소 자원개발연구부) ;
  • 신희순 (한국자원연구소 자원개발연구부) ;
  • 최성웅 (한국자원연구소 자원개발연구부 post-Doc.) ;
  • 이희근 (서울대학교 자원공학과)
  • Published : 1994.04.01
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Abstract

The hydraulic fracturing in a field site was performed for the measurement of in-situ stresses. For the estimation of the effect of a preexisting inclined fracture, the test on a preexisting fracture zone was also conducted. From the measurements at three shallow depths, the ratios of max. to min. horizontal stress showed the range of 1.19-1.56 and the K values showed the range of 2.62-3.86. In case of a preexisting fracture with the inclination of 15 degrees, the stresses calculated as upper bound values by considering it. It seemed from this that the inclination less than 15 degrees had small effect on the stress calculation.

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