Influence of geometrical distribution of rock joints on deformational behavior of underground opening |
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| Authors: | Yujing Jiang Yosihiko Tanabashi Bo Li Jun Xiao |
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| Affiliation: | aFaculty of Engineering, Nagasaki University, Nagasaki 852-8521, Japan;bGraduate School of Engineering, Nagasaki University, Nagasaki 852-8521, Japan;cJapan Nuclear Cycle Development Institute, Tokyo 319-1194, Japan;dResearch Center for Geo-environmental Science, Dalian University, Dalian 116622, PR China |
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| Abstract: | Mechanisms of deformation and failure of underground opening in jointed rock masses are governed by the characteristics of the geometrical distribution of discontinuities. In this paper, the extracting method of geometrical distribution of discontinuities in rock masses by image processing is presented and used to make networks of rock joints from the construction field. Next, using those networks, fractal characteristics of the discontinuities are described by using the box-counting method for quantitatively evaluating the state of the discontinuous distribution. Finally, numerical analysis based a case of the excavation of underground power plant is carried out to find the relation between geometrical distribution of rock joints and deformational behavior of underground opening by using distinct element method. |
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| Keywords: | Box fractal dimension Discontinuity geometry DEM Deformation Image processing Underground structure |
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