Experimental Study on the Marker Gases of Coal Seam Spontaneous Combustion in Liujialiang Coal Mine

Spontaneous combustion of coal seam seriously threatens the production safety of mine, in order to better predict the spontaneous combustion of coal seam in coal mine and guide the prevention and control of coal mine fires, the author takes the coal samples from different working faces in the No. 2 and No. 5 coal seams of Liujialiang Coal Mine as examples to carry out temperature tests, on the basis of analyzing experimental data, the information of CO, C2H4, and other gases changing with temperature is obtained, the characteristics and rules of spontaneous combustion of coal seam in Liujialiang Coal Mine are studied, and the marker gases of different working faces are analyzed and optimized, CO and C2H4 are selected as the marker gases of spontaneous combustion in the coal face of No. 2 coal seam, No. 5136 coal face of No. 5 coal seam and No. 5135 driving face of No. 5 coal seam. By processing the experimental data, the corresponding mathematical model is established, and the fitting curve obtained can better reflect the change trend of the marker gases during spontaneous combustion of coal seam, which has certain guiding significance for preventing spontaneous combustion of coal seam in working face.