Research on comprehensive fire prevention and control technology for goaf in complex geological working faces
In order to explore the fire prevention and control technology in the goaf of fully mechanized mining face under com-plex geological conditions,the distribution law of the"three zones"of spontaneous combustion of residual coal in the goaf was studied through the on-site arrangement of bundle tube measuring points.Based on this and combined with geological conditions,comprehensive fire prevention,and control measures such as sealing the lower corner,hanging wind barriers,reducing air supply,and injecting N2 into the goaf were studied and implemented.The results indicate that:firstly,after adopting comprehensive fire prevention measures in the working face,the range of the oxidation zone can be reduced,allowing the residual coal in the goaf to enter the suffocation zone in a timely manner and eliminating the natural ignition environment of the residual coal;secondly in ge-ological complex areas such as faults where the working face passes,the CO concentration at each measuring point in the goaf continuously decreases after spraying the inhibitor.When the fault enters the goaf for 60 m,the CO concentration is below the safety index value.
goafspontaneous combustionfire prevention and extinguishing
NETL
NSTL
万方数据
维普
