In order to solve the problem that the residual coal oxidation in the goaf caused by the min-ing of the working face through the structural area threatens the safe production of the working face,the geo-logical conditions of the working face,the spontaneous combustion of the coal body and the principle of nitro-gen injection fire prevention and extinguishing are analyzed,and the nitrogen injection fire prevention and extinguishing technology is used to control the goaf.The Fluent numerical simulation software was used to cal-culate the nitrogen injection position.The interval nitrogen injection was designed at the position of 50 m be-hind the working face,and the nitrogen injection amount was 2 200 m3/h.The results show that after the ni-trogen injection fire prevention and extinguishing measures are taken in the working face,the CO concentra-tion decreases from 0.009 6%to the highest 0.000 2%,which ensures the safe production of the working face.
关键词
综采工作面/煤自燃/氧化带/间隔式注氮
Key words
comprehensive working face/coal spontaneous combustion/oxidized zone/interval nitro-gen injection
维普
万方数据