The analysis of three-dimensional roadway's influence on spontaneous combustion in caving mining thick coal seam

In allusion to the spontaneous combustion problem of coal seams in the process of full mechanized top-coal caving mining,analyzing the reason of coal spontaneous combustion,we have presented three-dimensional roadway layout scheme which along the seam roof and floor layouts section return airway and air intake.Then according to the influencing factors of coal spontaneous combustion hazard,the hierarchy structure model was established including each level judgment matrix,and used the combination of qualitative and quantitative AHP(Analytic Hierarchy Process)analysis.The results showed that using the new roadway layout system the danger of the coal seam spontaneous combustion has a lower level.Actual production verification,using three-dimensional roadway layout scheme,Spontaneous combustion has not occurred In working face and goaf.This verification confirmed the objectivity of research.