Qi Qingxin; Mao Debing; Fan Shaogang; Seisuke Okubo Beijing Research; Institute of Coal Mining China Coal Research; Institute Beijing 100013 China Tokyo university Tokyo Japan;

• 煤炭科学研究总院北京开采研究所;天地科技股份有限公司高新事业部;日本东京大学大学院;