*Frances Chikanda¹, Tsubasa Otake², Tatsuya Matsui¹, Sereyroith Tum¹, Tsutomu Sato² (1.Division of Sustainable Resources Engineering, Graduate School of Engineering, Hokkaido University, 2.Division of Sustainable Resources Engineering, Faculty of Engineering, Hokkaido University)

*Sereyroith Tum¹, Tsutomu Sato², Tatsuya Matsui¹, Sitha Kong³, Yoko Ohtomo², Ryosuke Kikuchi², Tsubasa Otake² (1.Graduate School of Engineering, Hokkaido University, 060-8628, Sapporo, Japan , 2.Faculty of Engineering, Hokkaido University, 060-8628, Sapporo, Japan, 3.Geology Department, Ministry of Mine and Energy, 12210, Phnom Penh, Cambodia)

*Tatsuya Matsui¹, Sereyroith Tum¹, Frances Chikanda ¹, Yoko Ohtomo², Tsubasa Otake², Ryosuke Kikuchi², Tsutomu Sato² (1.Graduate School of Engineering, Hokkaido University, 2.Faculty of Engineering, Hokkaido University)