id	keyword
esrj-91378	coal
esrj-91378	rock
esrj-91378	mining
esrj-91378	semi
esrj-91378	face
esrj-91378	seam
esrj-91378	working
esrj-91378	roadway
esrj-91378	pressure
esrj-91378	stress
esrj-91378	layer
esrj-91378	coal seam
esrj-91378	pillar
esrj-91378	deformation
esrj-91378	width