Abstract: Fushun West Open-pit Mine is close to the stage of pit closure， and the treatment of high and steep slopes in the north and south sides is an urgent problem to be solved.Traditional mines often focus on two-dimensional GIS map，the shortcomings of low accuracy of modeling technology， single the data source， higher restrains of platform was existed，besides that，it is difficult to combine real-time，efficient and process-oriented three-dimensional spatial data for spatial analysis.Based on the B/S framework，the secondary development of SuperMap web end was done，and the WebGIS system of Fushun West Open-pit Mine was established.Based on "underground-surface-ground" multi-space true 3D fine modeling，the 3D GIS spatial computing ability was applied to the high-precision digital elevation model （DEM），so as to effectively solve the prediction calculation problems of the construction period and backfill volume of different treatment schemes.According to the volume analysis module of the system，the backfill volume，water filling volume，slope cutting volume and backfill period of the treatment scheme proposed by Fushun West Open-pit Mine were calculated.The results showed that the backfill volume is 178 million m3， the water filling volume is 690 million m3，the slope cutting volume is 23 million m3，and the backfill treatment period is 10.5 years.At the same time， based on the integration of the information of mine geological data， landslide area，mechanical calculation results，hydrogeological information and InSAR monitoring data，a multi-dimensional multivariate information integration platform was established， the problem of information island was effectively solved.

Key words: open-pit mine, B/S framework, WebGIS, slope treatment, spatial analysis, multivariate information