Research on Asymmetric Failure Mechanism and Control Technology of Roadway Along Gob in Extra Thick Coal Seam

Taking roadway along gob with narrow coal pillar in fully mechanized top coal caving face for extra thick coal seam as the research object, this paper systematically studies two key problems of asymmetric failure mechanism and control technology of gob side entry driving in extra thick coal seam by using comprehensive research methods such as theoretical analysis, numerical simulation and field measurement. Firstly, by establishing the...