Research on the engineering practice and roof control technology for main roadway coal pillar recovery working face passing through overlying goaf
As a retaining structure of coal mine mining,the main roadway coal pillar has a significant impact on the full utilization of resources and efficient production of mines,and the application of main roadway coal pillar recovery technology has become a key challenge.Based on the actual engineering background of the main roadway coal pillar recovery in third panel of the No.12 coal seam in Huojitu Coal Mine,the engineering practice and roof control technology of flexible-mold pumping support and artificial false roof construction technology adopted during the working face passing through overlying goaf were introduced,which provided reference for the main roadway coal pillar recovery technology in close-distance coal seam group with similar mining conditions.
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