THREE DIMENSIONAL VISUALIZATION OF ROCK FRACTURING PROCESS

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A series of experimental and theoretical investigation for the three dimensional visualization of rock fracturing process has been carried out. Results obtained are as follows.(1) The visualization of the fracture under various circumstances and loading conditions has been performed. It is clarified that the fracture process of granite under uniaxial compression is characterized by the crack propagation with complex modes. And it is confirmed that the failure process of rock splitting can be interpreted as the development of the process zone in front of the crack tip.(2) It is confirmed that X-ray CT method is effective to measure the aperture of open cracks and fluid migration in rocks.(3) The fragmentation process of rock was analyzed by FEM with taking into account the crack propagation and the heterogeneity of strength. It is made clear that the localization process is strongly affected by the strength heterogeneity.(4) The spatial distribution of attributes of rock joints has been analyzedy geomathematical methods. It was pointed out that the visualization of rock joint distribution is useful to evaluate the seepage flow in rock mass.