某矿1302综放工作面为孤岛工作面，分析了其特殊的自然发火规律：采空区周边发火率高，中部发火率低；本工作面采空区发火率低，相邻采空区发火率高；两道两线位置发火率高。通过测定工作面的压能分布，计算1302工作面与周边采空区的漏风量，显示1302工作面基本上实现了与邻近采空区的均压通风。测定1302工作面的三带分布范围，不自燃范围带为采空区后20 m，自燃带为采空区后20～55 m，窒息带为采空区后55 m。计算得出最小推进速度为16．7 m，以目前1302工作面推进度推算，采空区自然发火的可能性极低。%1302 fully mechanized caving face of a coal mine is a island mining face,and the special spontaneous combustion rules are analyzed,that is ignition rate of the goaf surrounding is high,central section ignition rate is low. The working face goaf ignition rate is low.Adjacent goaf ignition rate is high.The position of air intake duct,return air duct,production line and stop line ignition rate are high.By measuring the pressure distribution of the working face,the air leakage of 1302 working face and goaf surrounding is calculated,it shows that the pressure balancing ventilation of 1302 working face and adjacent goaf is basically realized.Three zones distribution range of 1302 working face is measured,heat dissipation zone is the range of 20 m after the goaf,spontaneous combustion zone is 20~55 m after the goaf,suffocation zone is the range of 55 m after goaf.It calculates that the minimum advance rate is 16.7 m. According to the 1302 working face impelling speed at present,possibility of goaf ignition is very low.
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