Application of Comprehensive Fire Prevention and Extinguishing Technology in the Mining of the Roof Unloading and Pressure Retaining Roadway Working Face
In response to the serious air leakage and high risk of spontaneous combustion of residual coal in goaf during the use of roof cutting and pressure relief roadway technology in the 62711 fully mechanized mining face,combined with on-site conditions,a fire prevention and extinguishing technology with reducing air leakage and rapid inerting of goaf as the core is proposed and applied in engineering.Real time monitoring of gas composition in the goaf can be achieved through the bundle tube monitoring system during mining face recovery,achieving early warning of spontaneous combustion of residual coal.Spraying inhibitors and injecting nitrogen can reduce the contact between residual coal and oxygen,thereby slowing down or even inhibiting the spontaneous combustion and oxidation process of residual coal.Spraying polyurethane to seal the goaf in the roadway section can reduce the air leakage in the goaf.When there is a sign gas of spontaneous combustion in the mining face or goaf,the potential spontaneous combustion oxidation area can be covered by pouring gel into the goaf to prevent the oxidation process in time.After on-site application,the 62711 fully mechanized mining face was able to safely and efficiently recover,and no self igniting gas was detected in various positions of the mining face or goaf,achieving good fire prevention and extinguishing effects on site.
coal miningspontaneous combustion coal seamcutting top pressure reliefair leakage in goafspontaneous combustion of residual coal
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