WANG Liang,CHENG Yuan-ping,LI Feng-rong,etal. Fracture evolution and pressure relief gas drainage from distant protected coal seams under an extremely thick key stratum [J].Mining Science & Technology,2008,18(2):182-186.
BEAMISHBB,CROSDALEPJ. Instantaneous outbursts in underground coal mines: an overview and association with coal type [J]. International Journal of Coal Geology,1998,35(1-4): 27-55.