关键词: 稳定性, 空区处理, 数值仿真, 爆破

Abstract: According to the spatial occurrence relationship of the footwall Iron ore-body and upper bauxite iron，it is possible to impact the stability of the bauxite ore-body if the retained pillar footwall iron was recovered.In order to ensure the safe and efficient exploitation of bauxite ore，it is required to lower the influence on the stability of vanadium orebody when the remained iron ore-body is explored at footwall.Two kinds of pillar recovery methods and treatments of mine goaf were proposed，in which the mining schemes consisted of scheme 1 the interval mining between ore pillar and scheme 2 the controlled blasting between interval ore pillars.Numerical simulation analysis on the two programs was conducted.The results showed that the scheme 1 can effectively control the vertical displacement of the rock on the upper plate，with ultimate displacement of only 10.83 mm.In the scheme 2，the larger vertical displacement reached 17.45 mm after excavation of the upper surrounding rocks，which may cause the collapse of the upper surrounding rocks.It is determined that scheme 1 be the final program of pillar recovery and goaf treatment.

Key words: Stability, Goaf treatment, Numerical simulation, Blasting