Coupling Evaluation of Surface Building(Structure)Stability During Filling and Mining of a Metal Ore Body
In order to study the influence of underground mining on the stability of surface structures in a metal mine,a coupling method for evaluating the stability of surface structures is proposed by using the-oretical analysis,3D fine modeling and numerical simulation analysis.The results show that the whole sur-face of the filling mining method is uniform settlement,which has little influence on the stability of the sur-face structures.The maximum principal stress increases polynomial with the increase of mining steps,and the minimum principal stress increases linearly.Through theoretical analysis and calculation,the surface deformation value and particle vibration velocity of mining area are less than the critical value required by relevant regulations.The range of each plastic zone is small,and filling mining can effectively avoid further expansion of tensile and shear failure areas.The mining of the ore body causes the surface of the ore body to sink in a cone shape,and the surface deformation value of the mining area is far less than the critical defor-mation value in the code.Underground mining will not have an impact on surface structures.
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