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《Fire Safety Science》 2007-04
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Inferior spontaneous combustion state and transformation towards spontaneous combustion in goaf

LI Zong-xiang1,MENG Xian-chen1,PAN Li-ming2,XI Li-guo3(1.College of Vocational,Liaoning Technical University,Fuxin 123000,China;2.Ventilation Bureau,Fuxin Mining Group,Fuxin 123000,China;3.Haizhoulijing mine,Fuxin Mining Group,Fuxin 123000,China)  
The concept of inferior spontaneous combustion state in goaf is presented regarding the coal goaf with high risk of spontaneous combustion.The goaf spontaneous combustion during mining can be understood to result from the transformation of inferior spontaneous combustion state to spontaneous combustion state,with short transforming time which is less than the shortest spontaneous combustion time.Spontaneous combustion process under different conditions satisfies superposition combination principle,and the transformation process is due to the superposition of over two kinds of processes.Transformation may be affected by factors such as the degree of inferior spontaneous combustion state(immobile temperature),working face impelling speed,air leakage and oxygen supply,stack state and fire security measures(nitrogen injection),etc.The theory of inferior spontaneous combustion state can explain that once some unfavorable factor appears,spontaneous combustion can be induced in short time(burst spontaneous combustion).The concept of inferior spontaneous combustion state will help understand the evolution of spontaneous combustion in practical goaf,and realize the early prevention of the spontaneous combustion in goaf.
【CateGory Index】: TD752
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