Abstract: To guarantee the stability of overlying strata and shaft on shallow and large scale mined area residual ore extraction and ensure the security of dormitory，equipment and personnel above the mining area，Chaobuleng mining engineering is taken as background to analyze the failure mechanism of goaf roof and shaft，based on preliminary exploration and sampling，field testing and laboratory experiments on mechanics.Based on H-K system，the roof rheological mechanical model for ore body in goaf is established to provide a theoretical basis for the recovery of residual ores.With the FLAC3D numerical simulation software，the change law for stress and displacement of overlying strata and shaft is analyzed.The results show that after area Ⅲ mining，the maximum stress is 0.13 MPa and the maximum displacement is 1.6mm in the overlying strata，and the maximum stress is 5.9Mpa and the maximum displacement is 0.2 mm in the shaft.Both can meet requirement of the limited standard.The research provides a reference for extraction of residual ore in shallow and large mined-out area.

Key words: Extraction, Overlying strata, Numerical simulation, Large mined-out area, Shaft