Ventilation of Pillared Areas by Bleeder Entries, Bleeder Systems, or Equivalent Means.
SME-AIME Trans 1973 Dec; 254:284-291
Adequate ventilation in coal mines depends upon good face control, as well as upon a well-designed and properly controlled overall ventilation system. The fundamentals of effective bleeding for provision of good ventilation and control and removal of methane are described. The various mine pillaring systems for which it is both easy and difficult to provide effective bleeder systems are detailed. Bleeders in conjunction with longwall mining are also discussed.
SME-AIME Trans., V. 254, December 1973, PP. 284-291