Calculation of Crack Tensor and Evaluation of Rock Property Using the Drilling Core and Geophysical Logging Data

Abstract

We can not calculate the crack tensor for rock mass evaluation using the drilling core data, because we can not detect the all of data necessary to the calculation such as length, orientation, width of fracture. In this paper we carried out the borehole TV and single borehole radar in addition to the observation of core samples. We decided the distribution of fracture parameters statistically in this borehole, using these geophysical data. Then, we calculated the crack tensor of rock mass along the borehole and discussed on the properties.