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Home  >  Journal list  >  Journal of the Society of Materials Science, Japan  >  Vol.55  No.5 (2006)  >  pp.501-506

Journal of the Society of Materials Science, Japan
<<Previous article Vol.55  No.5 (2006)   pp.501 - 506 Next article>>

Mechanism of Discontinuous Behavior of Rock Mass during Underground Cavern Excavation

Tsugio YOSHIDA1), Yuzo OHNISHI2) and Satoshi NISHIYAMA2)
1) The Kansai Electric Power Co., INC.
2) Dept. of Urban and Enviromental Eng., Kyoto Univ.


Various kinds of measurements were carried out during excavation of two large underground caverns to estimate rock behavior as a discontinuous material. As a result, rock behavior as a discontinuous material was estimated in detail, such as characteristics of crack propagation, displacement and stress redistribution. In particular, it was found that characteristics of displacement and stress redistribution were very remarkable in some areas and that crack propagation was also remarkable in the area. Through the measurements, it was suggested that the sliding of discontinuities were related to the discontinuous behavior. So with a simulation in which the discontinuities were modeled, the influence of the sliding of the discontinuity to crack propagation, displacement and stress redistribution is discussed.


Keyword:
Underground cavern, Rock mass, Field measurement, Stress redistribution, Crack propagation

Received: August 11, 2005
Published online: June 03, 2006
Copyright (c) 2006 by The Society of Materials Science, Japan

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