Spontaneous Combustion "Three Zone"Division of Layering Mining Face in Inflammable and Extremely Thick Coal Seam and Its Prevention Measures

Through the method of bundle tube monitoring in goaf, it is obtained that the range of spontaneous combustion "three zone" in goaf of 401101 working face and the working face lowest advancing rate. Based on the results of measurement and analysis, the comprehensive fire prevention and control methods are used. Finally, through the change of CO concentration, it shows that the measures achieve good results for fire prevention and control in goaf of working face.