Filling mining is an effective way to liberate the'three unders'coal,prevent surface sub-sidence and realize the sustainable development of coal resources.Based on the background of Dongshan Gu-cheng Coal Mine in Shandong Province,the feasibility of paste filling replacement mining for coal under buildings is analyzed,and the optimization measures are put forward.The results show that the implementa-tion of paste replacement mining filling project can effectively solve the problem of coal mining under build-ings in Gucheng Coal Mine,alleviate the shortage of coal resources,reduce the impact of surface subsid-ence,and improve the economic benefits of coal mines.The proposed optimization measures provide techni-cal reference for similar mines.
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