Abstract: In order to maximized the recovery rate of high grade copper pillar in the Hongtoushan copper mine shallow middle segment，took residual ore in -47 m middle segment as study object，established the three-dimensional model of remnant by 3D Mine，combined with the morphology and occurrence conditions of residual ore，proposed a economy reasonable and technically feasible solution residual ore mining program，simulated and analyzed the horizontal displacement and the minimum principal stress of pillars during residual ore mining by MIDAS/GTS and FLAC^3D.The analyses show most pillars are safety and reliability in the mining process，except 1^#、9-1^#、9-2^# and 10^# pillars have a great horizontal displacement in the simulation which should recovery under a certain security measures or keep as permanent.

Key words: Numerical analysis, Stability, Residual ore recovery, Mining methods