Abstract: Surface buildings and structures located within surface mining movement in producing mines.If the safety and reliability of buildings and structures are judged according to general principle of delineating the range of surface movement,the result is unsafe or security pillars are reserved to ensure safety.To analyze the safety and reliability of buildings in the range of surface movement zone,using FLAC3D establish numerical simulation model and study the surface movement of mining area,also combining with the damage grade evaluation criteria of building,the results could be reasonable,which has a certain reference for similar conditions mines.

Key words: Surface structures, Mining movement range, Numerical simulation, Safety and reliability