Abstract
This paper described groundwater behavior due to the construction of large-scale caverns st Kikuma underground oil storage plant. This paper showed that groundwater behavior during cave excavation is heavily affected by discontinuity of rock masses based on field measurement results. This investigation made it clear that the concept of crack tensor has great potential to quantify the relationship between groundwater behavior and the distribution of discontinuity of rock mass by analyzing the distribution of cracks in rock masses observed at the surface of excavated caverns during construction.
