Abstract: How to realize the safe and efficient mining of gently inclined orebodies under complex terrain is the key problem that needs to be solved urgently.Taking a phosphate mine in Yichang City as the engineering background，a zoning stope structure was constructed based on the uneven distribution of in-situ stress.Based on the concept of "synergetic mining "，a strip mining and zoning synergetic mining technology was proposed to realize the coordinated mining and filling operations in the same area.Based on the physical similarity simulation test method ，the deformation and deformation characteristics of the roof and surrounding rock pillars during the synergetic mining process in the zone were studied，and the bearing mechanism of the mine pillars in the zone filling process was discussed.The results show that the mutual interference between the mining areas is weak，the degree of stress transfer of the surrounding rock is greatly affected by the depth of the burial and the mining steps；with the synergetic operation of mining and filling，the roofs above the strips in different mining areas are pulled and compressed staggered distribution；in the process of zonal synergetic mining，the surrounding rock and backfill ore pillars did not undergo significant damage，one-step backfill bodies and the surrounding rock ore pillars were the main bearing bodies in the stope，the bearing capacity of the two-step backfill bodies were relatively weak；asymmetric deformation occurred between the pillars of the panel and isolation pillars.In order to further reduce the filling cost，the mechanical strength of the two-step filling body was appropriately reduced based on the original synergetic filling mode，and the feasibility of the optimized stope filling mode was verified by numerical simulation methods.The strip-filled zone synergetic mining technology proposed in this paper could help for realizing the comprehensive objective of safety，efficiency and economy mining of the gently inclined deposits under complex terrain.

Key words: Synergetic mining, Gently inclined deposit, Complex terrain, Strip filling, Similarity simulation