id	keyword
esrj-84502	stress field
esrj-84502	tectonic
esrj-84502	mining area
esrj-84502	period
esrj-84502	pingdingshan
esrj-84502	joint
esrj-84502	shear
esrj-84502	yanshanian
esrj-84502	eastern
esrj-84502	coal
esrj-84502	direction
esrj-84502	evolution
esrj-84502	china
esrj-84502	plate
esrj-84502	structure
esrj-84502	north
esrj-84502	fault