Abstract: Fragmentation problems of data storage and input of traditional three-dimensional modeling software are existed significantly.Taking a iron mine in Tonghua City,Jilin Province as the study example,based on analyzing the geological characteristics and hydrogeological characteristics of the mining area,combing with SQL Server Compact 4.0 and SQL Server 2008 database and Civil 3D modeling software,the mine geological data cloud service system is established,and the three-dimensional geological modeling process is analyzed from the aspects of data storage and management,cloud data synchronization,basic geological data input.The study results show that:functions of query,analysis and modify of the model elements are realized based on the cloud server and core data of local three-dimensional geological model,and the profile figure and floor figure can be drawn effectively,the bidirectional dynamic automatic correlation is realized,which simplified the basic geological data input process greatly,and is good for solving the problems of data storage and data migration of the traditional three-dimensional geological modeling softwares.Based on the above analysis results,in view of the landslide and collapse geological disaster types that are mainly existed in the mining area,according to the topography and landform characteristics of the area the sliding body is existed,development characteristics of the master structural planes of dangerous rock mass,instability failure mode of dangerous rock mass,the dangerous rock mass is regarded as fully rigid block,the stability calculation method of different types of dangerous rock mass under the different load combinations is discussed based on limit equilibrium theory.The above analysis results of this paper can provide some reference for the further settlement of the geological hazards in the mining area.

Key words: Hydrogeological characteristics, Cloud data, Three-dimensional geological modeling, Equilibrium theory, Geological hazard