Prevention and control method of coal spontaneous combustion in thick coal seam goaf based on inerting balance

The thick coal seam mining process is affected by the original layering mining technology, and the original goaf is exposed, and the air flow in the working face leaks into the goaf under the action of pressure difference, which is easy to cause the spontaneous combustion of broken residual coal in the goaf and produce a large number of harmful gases. Based on coal pillar (north) fully mechanized caving face of main lane of Shuiliandong Coal Mine as an example, based on the analysis of thick coal seam fully mechanized working face and goaf under the condition of the coupling relationship between the flow fields, on the basis of using SF6 gas leakage test and numerical analysis method, the combination of the working face through the characteristics of the mined-out area in the process of extraction and the law of air leakage, the prevention and control method of coal spontaneous combustion in thick coal seam through goaf based on inert equilibrium is proposed. The results show that there are obvious air leakag