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A Study on Correlation between Heterogeneity Index and Mechanical Properties of Igneous Rocks using 3D X-ray Computed Tomography Image

3차원 X-ray CT 영상을 이용한 화성암 불균질 지수와 역학적 특성과의 상관관계에 대한 연구

  • Received : 2017.10.22
  • Accepted : 2017.10.26
  • Published : 2017.10.31

Abstract

In this study, the heterogeneity of internal structure of various igneous rocks acquired in Korea was quantified and correlated with the seismic velocity and the point load strength. Three-dimensional X-ray Computed Tomography (CT) was used to obtain information on the internal structure of the rock specimen, and the representative unit length (LR) was calculated by applying a statistical technique to the CT images. We also proposed an estimation equation to predict the mechanical properties of rocks from the relationship between LR, acoustic velocity and point load strength. In the proposed method, it is shown that the characterization of internal structure of rocks could be utilized as an indirect index to account for the mechanical behavior of rocks by substituting physical laboratory testing for non-destructive test.

Keywords

3D X-ray CT;Igneous rock;Point load strength;Elastic wave velocity;Internal structure of rocks

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Acknowledgement

Supported by : 한국연구재단, 에너지기술평가원