205301 Research on evaluation of dynamic fracture characteristic by ESPI (original) (raw)
2011, The Proceedings of Conference of Kanto Branch
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A tracer migration test carried out around the KD-90 drift in the Kamaishi Mine, Japan was analyzed using the computer code "Don-Chan". Geological structure developing in the rock mass near this drift was carefully studied for making a 3-D channel network model. It was found that two major fracture sets are developing in the rock mass and that the lineations observed on the fracture planes mainly develope in the perpendicular direction to the intersection line between these fracture sets. Those nature of the fracture system implies that these fractures sets were initially formed as the conjugate sets and the stress conditions acting on the rock mass have not so much changed. A channel network was constructed on the basis of those features of the fracture system. The tracer migration was fairly well analyzed by the "Don-Chan" code. The applicability of this code was also examined.
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