Abstract: Large minedout area appeared after multi-level mining with open stoping method in metal mine，and large-size minedout area is main reasons for the surface subsidenceTo protect safety mining of the medium section and control surface subsidence，it is suggested to choose a reasonable level to make overall filling and forming stress spacing bond before deep miningIn order to ensure the reliability of the filling key bond scheme，and taking a gold mine as the example，the overall mining and filling process is stimulated with three-dimensional finite element analysis software of elastic plasticity.Based on the analysis of surface subsidence displacement，a reasonable result is achievedIt is verified that the filling key bond for the medium-section ore-body is the effective factor which control the surface subsidenceIt provides ascientific basis for the on-site construction

Key words: Minedout area, Surface subsidence, Elastic plasticity, Numerical simulation