Abstract：The mining subsidence mechanism of metal mine with fractured blocky rock mass is different from that of coal mine with layered rock mass. In order to guide the safety production and prevent the ground subsidence，the Beiminghe iron mine is taken as the research background. Based on GIS(geographic information system) and probability integral approach，a research is done for predicting the subsidence of Beiminghe iron mine. A three-dimensional calculating model related to geographic，geologic and inherent information is established；and then the system MSDAS-GIS，which is developed by the probability integral and component techniques，is used to predict the mining subsidence. By using the effective spatial analytical function and the drawing tool of GIS，the analytic results intuitively show the degree and scope of mining subsidence. By comparison with the observation data of the ground surface and actual situation，the proposed approach is verified and a three-dimensional visual platform is offered for safety control of the metal mine.
