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Abstract In order to eradicate fire hazard of Shanxi Tongxinyao Mine, based on CO concentration overrun in 8516下 working face recovering mining, with CO overrun after control, the working face was blocked, fire preventing and extinguishing measures were analyzed, Nitrogen injection, yellow mud grouting and surface fracture filling were adopted, CO gas concentration declined to 1 mmp after control, with obvious fire-fighting effect.
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