This paper firstly used FLAC3D for simulating the surface subsidence of the old goaf of the Hengshan gypsum mine where has been collapsed. Secondly, simulating the surface subsidence of the old goaf with different structural parameters has been used and analyzed the factors which is influencing the surface subsidence. Then, the simulating results were used for establishing the ANFIS (adaptive neuro-fuzzy inference system) model for predicting the surface subsidence of the old goaf and the fitting and predicting capabilities were analyzed. Finally, the ANFIS model was used for predicting the su...