id	keyword
esrj-67925	floor roadway
esrj-67925	stress
esrj-67925	mining
esrj-67925	floor stress
esrj-67925	overhead
esrj-67925	mining stress
esrj-67925	face
esrj-67925	coal
esrj-67925	working
esrj-67925	figure
esrj-67925	deformation
esrj-67925	rocks
esrj-67925	effect
esrj-67925	model