School of Resource and Earth Science;
China University of Mining Er Technology;
Xuzhou 221008;
China;
Henan Provincial Coal Seam Gas Development and Utilization Co.;
LTD.;
Zhengzhou 450016;
China;
Department of Industry and Business Administration;
Henan F.ngineering College;
Xinzheng 451191;
China;
Faculty of Safety Engineering China University of Mining & Technology;
Xuzhou 221008;
China;