Numerical Simulation and Strip Mining Design under Building of One Village

In order to solve the safety of mining under building of one village，based on mine geological situation and demand of mining under building，theory calculated by according pressure arch theory and three-dimensional stress coal pillar design theory，strip mining width and retain coal pillar width of 28 coal seam，recovery ratio was 46.2%，safety coefficient of coal pillar was 1.89，the loading of overlying strata could be supported，it meet the demand of design.Numerical model was built according theory results and geological parameters，the simulation results showed that surface subsidence was relative uniform，concave basin formed in the middle part of goaf，the maximal incline deformation of surfacei=0.017mm/m，curve ratio K=-0.15×10^-7/m，surface deformation was controlled during I level，building damage slight.Surface subsidence and deformation could be controlled by the strip mining scheme according simulation，then the damage mining to building was decreased.