The Journal of the Petrological Society of Korea (암석학회지)

The Petrological Society of Korea (한국암석학회)
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Evaluation for Rock Cleavage Using Distribution of Microcrack Spacings (V)

미세균열의 간격 분포를 이용한 결의 평가(V)

  • Park, Deok-Won (Climate Change Mitigation and Sustainability Division, Korea Institute of Geoscience and Mineral Resources)
  • 박덕원 (한국지질자원연구원 전략기술연구본부)
  • Received : 2017.08.31
  • Accepted : 2017.09.09
  • Published : 2017.09.30
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Abstract

Jurassic granite from Geochang was analysed with respect to the characteristics of the rock cleavage. The comprehensive evaluation for rock cleavages was performed through the combination of the 16 parameters derived from the enlarged photomicrographs of the thin section and the spacing-cumulative frequency diagrams. The results of analysis for the representative values of these spacing parameters with respect to the rock cleavage are summarized as follows. First, the above parameters can be classified into group I (spacing frequency (N), total spacing ($1m{\geq}$), constant (a), exponent (${\lambda}$), slope of exponential straight line (${\theta}$), length of line (oa') and trigonometric ratios ($sin{\theta}$, $tan{\theta}$) and group II (mean spacing (Sm), difference value between mean spacing and median spacing (Sm-Sme), density (${\rho}$), lengths of lines (oa and aa'), area of a right-angled triangle (${\Delta}oaa^{\prime}$) and trigonometric ratio($cos{\theta}$). The values of the 8 parameters belonging to group I show an order of H(hardway, H1+H2)

거창지역의 쥬라기 화강암에 대하여 결의 특성에 대한 분석을 실시하였다. 박편의 확대사진 및 간격-누적빈도 도표에서 도출한 16개 파라미터의 결합을 통하여 결에 대한 종합적인 평가를 실시하였다. 결에 대한 이들 간격의 파라미터의 대표값에 대한 분석 결과를 요약하면 다음과 같다. 첫째, 상기 파라미터는 그룹 I(간격의 빈도수(N), 총 간격($1mm{\geq}$), 상수(a), 지수(${\lambda}$), 지수 직선의 기울기(${\theta}$), 선의 길이(oa') 및 삼각비($sin{\theta}$, $tan{\theta}$) 그리고 그룹 II(평균 간격(Sm), 평균 간격과 중앙 간격 사이의 차이값(Sm-Sme), 밀도(${\rho}$), 선의 길이(oa 및 aa'), 직각삼각형(${\Delta}oaa^{\prime}$)의 면적 및 삼각비($cos{\theta}$)로 분류할 수 있다. 그룹 I에 속하는 8개 파라미터의 값은 H(3번 결, H1+H2)

Keywords

References

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