Abstract: The impact on ground surface caused by cemented filling method when used for mining steeply inclined orebody is different from that by other methods and has its own law. FLAC3D numerical simulation software is used to study the ground surface deformation caused by cemented filling in Jinchuan No.2 mining district. As a result, the general law of ground deformation in this district is proposed, and a preliminary conclusion is drawn that the ground fissures are caused by the mining. The phenomenon that the surface fissure occurrence lags behind the mining is interpreted, the calculation results are revised with GPS measurement results and the calculation reliability is verified. Finally, the effect of the elastic modulus of filling body on surface subsidence is studied.

Key words: Cemented filling mining, Ground surface deformation, Numerical simulation, Ground fissures, Jinchuan Nickel Mine