An underground ore body of a mine is within the security pillar range of a surface highway.In order to ensure the stability of the highway,Flac3D numerical analysis method was used to conduct a mining impact analysis,and the impact of mining blasting on the highway was demonstrated.The results show that the maximum subsidence of surface highway is 1.2 mm,the maximum slope value in the x direction of the surface is 0.185 mm/m,and the maxi-mum slope value in the y direction is 0.13 mm/m after mining the ore body at-300 m level;the maximum curvature value in the x direction of the surface is 0.011 × 10-3m-1,maximum curvature value in y direction is 0.012 × 10-3m-1;the maximum horizontal deformation of the surface in the x direction is 0.15 mm/m,and the maximum horizontal deformation in the y direction is 0.12 mm/m,both of which meet the requirements of relevant specifications.The surface particle vibration velocity during mining blasting is less than the safety allowable vibration velocity specified in the specification,so it is con-sidered that stope blasting has little impact on the surface.The research results provide technical support for the deep min-ing of the mine.
维普
万方数据