The post-mine active gas emission refers to the amount of gas discharged during storage, transportation and stacking after the coal is lifted out of the mine, that is, the gas content remaining in the coal. Users of this data should consider the variations in residual gas content depending on the metamorphic grade of the coal and account for differences in gas emissions post-mining. Special attention should be given to the handling and storage practices of coal, particularly from high-gas and outburst-prone mines. Design and implement safety and mitigation measures to manage the risks associated with gas emissions. This data should be integrated with broader environmental and safety assessments of coal mining processes, including Life Cycle Assessment studies, to ensure a complete understanding of the impacts associated with coal storage and transportation.