Abstract: Taking the deep mine Fushan Gold Mine as the engineering background,the 3D numerical analysis and modeling software 3DMine-FLAC3D was used to analyze the ore body displacement pattern and the influence of deep mining on the surface,and a 3D numerical calculation model of the integrated mine area in Fushan was established. The analysis was carried out for the effects of ore body displacement and surface deformation. The results show that:① The bottom drumming occurs at the lower plate of the ore body to different degrees due to the unloading effect of excavation,and the deformation of the upper plate of the ore body is characterized by sinking,and the further away from the ore body,the smaller the deformation of the surrounding rock. ② After the stoping and filling of the designed ore body,the maximum settlement deformation,tilt deformation, curvature and horizontal deformation of the surface can meet the relevant requirements of the ′ Nonferrous Metal Mining Design Specification ′ (GB 50771-2012). ③ The relative deformation at the center line of the main shaft and the 207 air shaft is small,and the mining activities of the underground ore body have no effect on the main shaft and the 207 air shaft. ④ The surface subsidence monitoring shows that the surface subsidence displacement caused by underground mining is very small.

Key words: deep gold mining,numerical analysis,underground mining,surface displacement,surface buildings (structures), shaft stabilization