of;
Mechanical;
and;
Electrical;
Engineering,;
China;
University;
of;
Mining;
and;
Technology,;
Xuzhou;
221116,;
China;
Research;
and;
Development;
Center;
of;
Mining;
Equipment;
and;
Materials,;
China;
University;
of;
Mining;
and;
Technology,;
Xuyi;
211700,;
China;