Key;
Laboratory;
of;
Coal;
Resources;
and;
Safe;
Mining,;
China;
University;
of;
Mining;
&;
Technology,;
Xuzhou;
221008,;
China;
of;
Mines,;
China;
University;
of;
Mining;
&;
Technology,;
Xuzhou;
221008,;
China;
Industry;
Jinan;
Design;
Institute;
Ltd.,;
Jinan;
250031,;
China;