Research on the Causes and Prevention Techniques of CO Accumulation in the Upper Corner of U-shaped Ventilation in Fully Mechanized Caving Face
Based on the research background of the 4101 fully mechanized caving face in Tong'an Coal Mine,the CO concentration in its upper corner was monitored,the root cause of the problem of excessive CO concentration was analyzed,targeted prevention and control measures were proposed,and industrial application experiments were conducted.Research has found that CO in the upper corner of the 4101 working face mainly comes from the goaf.A comprehensive prevention and control measure of spraying flame retardants and injecting nitrogen into the goaf has been proposed,and actual measurement and analysis have been carried out in the application stage.The diameterφ(O2)of the goaf can be reduced to below 8％,effectively inerting the oxidation reaction of residual coal in the goaf.The diameter φ(CO)of the upper corner is reduced to about 0.000 6％,effectively solving the problem of CO exceeding the limit in the upper corner and ensuring the safety production of the working face.
upper cornerinhibitorsfire prevention and extinguishingthick coal seam
NETL
NSTL
万方数据
