关键词: 地下开采, 超大型采空区, 采空区处理, 稳定性分析, 固体废物充填

Abstract: Aiming at the technical problems of high cost，high technical difficulty，high safety risk and low efficiency of traditional treatment methods for super-large goaf，the idea of organic combination of solid waste resource utilization and goaf treatment is discussed，the corresponding filling treatment of large goaf with solid waste is proposed，and filling technology and safety control method are given.Taking a mine in Longyan，Fujian Province as an example，firstly，the stability of three super-large goafs is analyzed by Mathews stability graphic method，it is show that large-scale mechanized filling operation can be carried out in these goafs；then，the properties and rational proportion of waste filling materials are tested and studied，and the reasonable material ratio of construction waste and tailings sand (volume ratio) is 5∶2；finally，the influence of the goafs after filling to its lower iron orebodies mining activities is analyzed，after mining operation，the roof displacement is 5~8 mm，two sides displacement is 2~4 mm，the overall displacement is small，the goaf stability is good.Through the comprehensive analysis of the disposal cost of the goafs and the income of the construction waste，the average cost is about 9.13 yuan/m²，which is much lower than that of other goaf filling methods.The study results indicated that the treatment method of super-large goaf by filling solid waste with large-scale mechanized operation can not only solve the problem of stability of super-large goaf，reduce mining cost and improves operation efficiency，but also suit the practical needs of treating super-large goaf and utilizing solid waste resources in non-coal mines.

Key words: Underground mining, Super-large goaf, Goaf treatment, Stability analysis, Solid waste filling