Monitoring and Fire Prevention Technology for the Three Zones of Goaf in the Ultra Long Working Face of Spontaneous Combustion Coal Seam
Taking the 3301 working face as the research background,in response to the characteristics of high mining height,high ground temperature,high humidity,and large amount of residual coal in the 3301 working face,the three zones of the goaf in the 3301 working face were monitored using on-site measurement method,and a fire prevention and extinguishing technical plan was formulated.After on-site measurement,it was determined that the range of the heat dissipation zone,oxidation zone,and suffocation zone on one side of the intake airway is outside 0～33 m,33～81 m,and 81 m,respectively.The range of the heat dissipation zone,oxidation zone,and suffocation zone on one side of the return airway is outside 0～21 m,21～72 m,and 72 m,respectively.Propose to use a comprehensive fire extinguishing technology of"whole area blocking and multi-source inerting"and a multifunctional integrated fire prevention and extinguishing system for fire prevention and extinguishing.After on-site application,the fire prevention and extinguishing capabilities of the mine goaf have been effectively improved,avoiding spontaneous combustion of residual coal in the goaf and creating favorable conditions for efficient coal recovery.
large mining height fully mechanized mining facespontaneous combustion coal seamthe"three zones"of goaffire prevention and extinguishing technologyoxygen concentration
万方数据
维普
