Basic analysis of rock mechanical and thermal properties in South Korea

This study analyzed the mechanical and thermal properties of various rock types found in South Korea. The results showed that both igneous and metamorphic rocks possess higher strength compared to sedimentary rocks. The Young's modulus of rocks is dependent on the extent of weathering they have undergone. The average cohesion of granites was found to be relatively higher compared to other rock types, and their friction angle also exhibited a relatively high value with a considerable variance. The results of uniaxial compression strength testing with respect to depth revealed that rock strength generally increased with depth, however, there was a large variance in strength distribution in each depth interval. Based on these findings, it can be concluded that South Korea can also secure HLW disposal sites and facilities in terms of rock mechanics by using crystalline rocks, similar to countries such as Sweden and Finland where disposal facilities are being built.