关键词: 煤自燃　, 供风量　, 倾斜煤层　, 数值模拟　, 煤自燃危险区域

Abstract: There are many residual coal and serious air leakage in the goaf of inclined coal seam,which provides a favor able environment for coal spontaneous combustion disaster.In order to explore the distribution law of coal spontaneous combus tion dangerous area in inclined coal seam goaf,taking 72 76 working face of Yuandian No.2 Coal Mine as the research object, the physical model of inclined coal seam goaf was constructed.Through the combination of field measurement,experimental re search and numerical simulation,combined with the qualitative and quantitative analysis of air leakage flow field in goaf,the distribution characteristics of coal spontaneous combustion dangerous area and high temperature point under different air supply volume were studied.The results show that the air leakage volume of the working face is basically consistent with the field measurement results,and the main air leakage area is concentrated in the range of 0~30 m along the inclined angle of the working face.With the increase of air supply volume,the width of coal spontaneous combustion danger zone increases gradual ly,and the coal spontaneous combustion danger zone on the intake side migrates to the deep part of the goaf.The maximum width of the oxidation zone increases by 1.3 m,but the coal spontaneous combustion danger zone on the return side gradually approaches the working face,and the maximum width increases by 4.1 m.The high-temperature point shifts to the deep part of the inlet side with the increase of air supply.The analysis results provide a theoretical basis for the prevention and control of coal spontaneous combustion in inclined coal seam goaf.

Key words: coal spontaneous combustion,air supply volume,inclined coal seam,numerical simulation,coal spontaneous combustion hazard zone