Study on the influence of complex mined-out area to the highway on earth surface based on FLAC^3D

In order to study the influence of complex mined-out area to the highways on earth surface, the model was built with FLAC^3D based on a mine,and it was used to study the settlement deformation characteristics of two highways on earth surface that affected by the complex mined-out area group.The laws of deformation on highways were gained,and the final ground surface settlement was predicted.The results showed that the highways on earth surface were not affected by the mined-out area under the current mining circumstance.However,the fluctuation on roadway surface and the alteration of gradient are required to be concerned.This research method can be a reference for similar mines.