Abstract: Currently, there is no precedent in engineering practice in China to build a power plant on goaf, therefore, the goaf control project in the construction site of the power plant is beneficial to the site selection of the power plant and the goaf control work. Based on the engineering background of goaf treatment in the construction site of 660 MW power plant in Huangling Mining, the detailed investigation of goaf in the project area in the early stage is summarized, and based on the consideration of geological, mining and site constraints in the investigation area, we determine the “grouting filling” treatment scheme by adopting the construction technology of “simultaneous grouting with aggregate at the orifice”,“adding quick-setting agent into the grout”,“construction curtain before construction interior”,thus achieving the aim of effectively filling the residual voids and mining fissures. The post-construction quality test shows that the residual cavities and mining fissures are effectively filled, the overall treatment effect is remarkable, and the foundation stability is good, indicating the feasibility and reliability of grouting filling technology in controlling the collapse of goaf.