Research on the key technique of evolving mining in the gob-surrounded pillar with fully mechanized mining

The current situation of revolving mining in the fully mechanized working face and the actual mining of working face 2443 and west-2 pillar (a gob-surrounded pillar) at the level of −520 m in Pangzhuang coal mine are analyzed. Parameters, behavior of rocks around coal face, entry layout and support technology are researched, which has provided some references for the fully mechanized revolving mining under complicated conditions.