^plaboratory;
of;
coalbed;
methane;
resources;
and;
reservoir;
formation;
process;
of;
the;
ministry;
of;
education,school;
of;
resources;
and;
earth;
science,china;
university;
of;
mining;
&;
technology,xuzhou;
221008,chi;
^pmining;
group,huainan;
232000,china;
^pmining;
group,tiefa;
112700,china;