id	keyword
esrj-113137	coal
esrj-113137	coal seam
esrj-113137	working
esrj-113137	mining
esrj-113137	interface
esrj-113137	working interface
esrj-113137	stress
esrj-113137	coal working
esrj-113137	coal mining
esrj-113137	regularity
esrj-113137	rock
esrj-113137	strata