Dr Ying Han Associate Professor in Safety Technology and Engineering School of Energy Science and Engineering Henan Polytechnic University, No. 2001, Century Avenue, Gaoxin District, Jiaozuo City, Henan Province, 454000, P. R. China Tel: +86-391-3987901 Mob: +86-13346798191 Email: hyhpu@hpu.edu.cn KEY AREAS OF EXPERTISE AND RESEARCH INTEREST: ? Coal Mine Gas Control: gas geology, gas drainage and exploitation, coal and gas outburst prediction and control ... more..>>