대심도 환경 봉압하 단일불연속면에서의 투수특성에 대한 연구 = (A) Study on Permeability Characteristics in the Single Discontinuity under the Deep Depth Environment

다국어 초록 (Multilingual Abstract)

Recently, many researchers have actively performed studies regarding underground radioactive waste repository isolation. The purpose of this study was to provide basic data for the underground radioactive waste repository isolation. In order to accomplish this purpose, we investigated the permeability characteristics in the single discontinuity under the deep depth environment.
We produced 9 specimens from the coarse-grained, medium-grained and fine-grained granite (3 specimens from each type of granite). We used the core of NX-size for the specimens.
We made a single discontinuity in the specimens through Brazilian test after constructing the wedge-type connecting device.
We performed a permeability test by applying the confining pressure of 10Mpa, 15Mpa, and 20Mpa, which are equivalent to the pressure of underground at the deep depth environment. We measured JRC values for each type of grained degree using Profile gauge and calculated the hydraulic aperture.
The results showed that the permeability coefficient and the hydraulic aperture were decreased with the increase in the confining pressure. JRC (Joint Roughness Coefficient) value was increased with the increase in the grain-size.

목차 (Table of Contents)

• 목차 = ⅰ
• 1. 서언 = 1
• 1.1. 연구 배경 및 목적 = 1
• 1.2. 연구방법 = 2
• 2. 이론적 고찰 = 3
• 2.1. 투수계수 산정 = 3
• 2.2. 초기지압 = 6
• 2.3. 거칠기(Roughness) = 8
• 2.4. 단일불연속면 수리학적 간극 폭 = 11
• 2.4.1. 간극의 정의와 측정법 = 11
• 2.4.2. 단일불연속면의 수리학적 간극 폭 = 14
• 3. 암석공시체 및 시험 = 18
• 3.1. 암석공시체 = 18
• 3.2. 시험장비 = 24
• 4. 결과 및 토의 = 31
• 4.1. 단일불연속면 형성을 위한 Brazilian test 결과 = 31
• 4.2. 단일불연속면에 대한 투수특성 = 41
• 4.3. 거칠기 측정결과 = 58
• 4.4. 암석의 수리학적 간극 폭 = 62
• 5. 결언 = 66
• 참고문헌 = 68
• 영문초록 = 71