id	keyword
ajst-30101	mining
ajst-30101	subsidence
ajst-30101	railway
ajst-30101	areas
ajst-30101	surface
ajst-30101	speed
ajst-30101	goaf
ajst-30101	engineering
ajst-30101	subgrade
ajst-30101	rock
ajst-30101	deformation
ajst-30101	movement