Abstract: This paper presents a case history of analysis mitigation of a barite concentrator tailing pond slope in Yundong Town, Duyun City. The physical and mechanical parameters of each soil or rock stratum were obtained throughout the field sampling and laboratory tests. The seepage field analysis of the tailing pond was carried out by using Van Genuchten model of the Seep/W seepage analysis module. The geotechnical model of the unsaturated tailing pond was established, and the Morgenstern-Price method was used for evaluation. The results indicate that the target slope belongs to a marginally stable slope with a factor of safety of 1.151, and the factor of safety becomes smaller with the increase of rainfall days. For the unstable slope, from the actual site conditions, the buttress-type retaining wall was selected for the support. The stability analysis of the mitigated slope is also performed. The retaining wall is designed in consistent with the building code. The overturning and slip aspects of the retaining wall are checked and the resultant factor of safety also meets the requirements of the building code.

Key words: Tailing Slope, Geo-Studio, Morgenstern-Price Method, Buttress Type Retaining Wall