residual coal pillar; gob-side entry driving; extra-thick coal seam; coal pillar size; surrounding rock control; directional long borehole; long-distance; heading face; permeability evolution; gas pressure evolution; gas drainage; pre-splitting blasting; roof cutting technology; hydraulic fracturing; no-coal pillar mining; thick hard roof; pressure relief technology; sandstone; deformation behavior; permeability evolution; mining stress path
Method and Technology of Green Coal Mining
Advances in Productive, Safe, and Responsible Coal Mining 
Physics of Coal and Mining Processes Method and Technology of Green Coal Mining
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