State Key Laboratory of Coal Resources and Safe Mining , Department of Resources and Earth Sciences , China University of Mining and Technology , Beijing 100083 , China/Henan university, Kaifeng 475000
State Key Laboratory of Coal Resources and Safe Mining , Department of Resources and Earth Sciences , China University of Mining and Technology , Beijing 100083 , China ;
State Key Laboratory of Coal Resources and Safe Mining , Department of Resources and Earth Sciences , China University of Mining and Technology , Beijing 100083 , China ;
State Key Laboratory of Coal Resources and Safe Mining , Department of Resources and Earth Sciences , China University of Mining and Technology , Beijing 100083 , China ;
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