The invention discloses a surface
subsidence meter budget method based on FLAC3D numerical
simulation. The
drill hole of the actually exposed mineral product is analyzed; geological conditions of mineral products during actual mining are combined; the strike and the inclination length of the mining face and the thickness of roof and floor strata of a selected drilling ore
bed are used as X, Y andZ lengths of the model; establishing numerical model, a Moore-
Coulomb physical model criterion is selected, a model obtained after mineral exploitation is defined as an empty model, the bottom of themodel is defined as a full-constraint boundary, left and right boundaries and front and rear boundaries as constraint boundary conditions, downward stress is applied to the top of the model accordingto the gravity of an overlying rock stratum in the
simulation exploitation process, and a ground surface
subsidence numerical value is output through node numbers. According to the method, physical and mechanical testing is combined, FLAC3D numerical
simulation software is utilized, an analysis and debugging model is established, mineral exploitation simulation solving is executed, a model response result is obtained, the influence of mineral exploitation on surface
subsidence is quantified, operation is easy, and practical application is easy.