Abstract: According to the characteristic of large danger goafs in Sandaozhuang open-pit mine, combined the domestic basic methods of mined-out area treatment that are blasting, filling, supporting, closing, mined-out area treatment technique of deep-hole blasting shaft-forming and filling poor mine was discussed, which relates blasting, filling, supporting.According to the existing equipments, design the plan of deep-hole blasting shaft-forming, parameters selection, charge structure and blasting network was studied.Advances the layout principle of equilateral triangle of filling shafts, the geometric model of evaluating filling effect was established, the function relationship among the distance of adjacent walls of filling shafts, height of mined area and filling shaft radius, which is the basement of evaluating filling effect and the multi-shaft design optimization in large mined-out area, was deduces.The mined-out area treatment with the deep-hole blasting shaft-forming is field tested.The experiment result testifies this plan is reasonable and economic.Research and application of the deep-hole blasting shaft-forming method and filling technique improve production safety, the contradiction of large-scale mining and mined-out area treatment is solved.It is useful for two level mineral management.Resources comprehensive utilization is achieved, and the purpose of reconciling ore is executed.

Key words: Open-pit mine, Mined-out area, Mined-out area treatment, Deep-hole blasting shaft-forming