id	keyword
easat-10478	rock
easat-10478	underground
easat-10478	roof
easat-10478	mining
easat-10478	vol
easat-10478	technology
easat-10478	sustainability
easat-10478	mass
easat-10478	collapse
easat-10478	coal
easat-10478	study
easat-10478	authors
easat-10478	strength
easat-10478	figure
easat-10478	fracture
easat-10478	area
easat-10478	research
easat-10478	learning