Abstract: Combined with the probability integral method and numerical simulation，the effect that underground mining conduct on the residential buildings around is studied.Results show that the residential buildings are at the boundary of the mining subsiding area，the dipping，curvature and horizontal deformation of subsidence are 0.08 mm/m，0.009×10-3 m，0.4 mm/m respectively，which are within the indexes given in related standards.The subsiding scope in numerical simulation is larger than that in probability integral method.Comparison of the subsiding scope at the same section shows that the subsiding width in numerical simulation is 407.6 m，larger than 366.7 m in probability integral method.Besides，fitting analysis on the subsiding monitoring data shows that the slope of the subsidence changing in recent years is less than 0.03，which means the ground subsiding tends to be steady and there is no new subsiding trend.Therefore，it is concluded that the residential buildings around will not be affected by the underground mining activities.It's found that error may occur in the choosing of the parameter reflecting the property of the overlying stratus，which lead to a difference between the results solved by probability integral method and numerical simulation.It's better to conduct studies in different ways to avoid error in dealing with problems in order to ensure the correction of the results and the harmony between underground mining and people's daily lives.

Key words: Probability integral method, Ground subsiding, Numerical simulation, FLAC