○Sophea BOEUT¹, Teppie OSHIMA¹, Yoshiaki FUJII¹, Junichi KODAMA¹, Daisoke FUKUDA¹, Hiroyuki MATSUMOTO², Kazumi UCHIDA² (1. Hokkaido University, 2. Kushiro Coal Mine)

○Tomoko Kyousaka¹, Takashi Takehara², Tsutomu Yamaguchi¹ (1. Toho University, 2. National Institute of Advanced Industrial Science and Technology)

○Takashi Yamada¹, Daisuke Fukuda¹, Jun-ichi Kodama¹, Yoshiaki Fujii¹ (1. Hokkaido University)

○Takuro Kimura¹, Jun-ichi Kodama¹, Takayuki Sugawara¹, Yosiaki Fujii¹, Daisuke Fukuda¹ (1. hokkaido university)

○Akira Wakabayashi¹, Hirotaka Matuda¹, Nariaki Kodama¹ (1. National Institute of Technology, Hakodate College)

○Umali Muhammad YASIDU¹, Yoshiaki FUJII¹, Jun-ichi KODAMA¹, Daisuke FUKUDA¹, Johnson DANDADZI² (1. Hokkaido University, 2. Mchenga Coal Mine)

○Yuya - Morishige¹, Syota Watanabe¹, Youqing CHEN¹ (1. Kyoto University)

○Erina Nihei¹, Daisuke Fukuda¹, Se-Wook Oh², Yoshitaka Nara³, Sang-Ho Cho², Jun-ichi Kodama¹, Yoshiaki Fujii¹ (1. Hokkaido University, 2. Chonbuk National University, 3. Kyoto University)

○Nao Ikeda¹, Junichi Kodama¹, Yoshiaki Fujii¹, Daisuke Fukuda¹ (1. Hokkaido University)

○Shogo Yano¹, Weiren Lin¹, Tatsuhiro Sugimoto¹, Aiming Lin¹ (1. Kyoto university)