Abstract: Excavated rock is the main waste in a mine.Lilou Iron Mine has the characteristics of large amount of rock excavation,difficult rock drainage and high cost.Based on the current development and mining engineering and equipment and facilities in the mine,a feasible scheme of rock drainage is proposed.Trough analysis and comparison,three key schemes of 3# main system drainage,combined auxiliary well drainage and goaf drainage are obtained.Combined with the plan for the next three years,the advantages and disadvantages of the three schemes are compared.The rock drainage plan is determined,which is dominated by the drainage of empty area and supplemented by the drainage of auxiliary well and 3# main system.The implementation process is introduced in detail,and the drilling scheme of inclined chute (well),construction process,blasting parameters and design parameters for rock drainage truck blocking are discussed,so as to ensure the personnel and equipment working in safe areas and improve the safety of goaf rock drainage.Through goaf rock drainage,50.74 yuan/t can be increased,and the annual capital saving is close to 10 million yuan.The economic benefits are very obvious,and the occupation of surface land is also reduced,the social benefits are good,which can provide reference for similar super-large mines.

Key words: Waste-free mining, Goaf rock drainage, Inclined chute (well) , Goaf truck blocking