^pof;
Civil;
and;
Environmental;
Engineering,;
University;
of;
Science;
&;
Technology;
Beijing,;
Beijing;
100083,;
China;
^pLaboratory;
of;
Mine;
Disaster;
Prevention;
and;
Control,;
Shondong;
University;
of;
Science;
and;
Technology,;
Qingdao;
266590,;
China;
^pTeaching;
and;
Section;
of;
Four;
Department,;
Artillery;
Academy,;
Hefei;
230031,;
China;