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RT @FrontEcolEvol: New Research: Research on the coupled support technology of a composite rock beam-retained roadway roof under close coal…
RT @FrontEcolEvol: New Research: Research on the coupled support technology of a composite rock beam-retained roadway roof under close coal…
New Research: Research on the coupled support technology of a composite rock beam-retained roadway roof under close coal seams: Introduction The technology of gob-side entry retaining without coal pillars in close (distance) coal seams is still… https://t