International Journal of Earth Sciences and Engineering

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Located in northwestern China, Qijiagou tailings pond is examined in this study. Since tailings pond is the fillings of tailings, physical properties of material in tailings pond are determined utilizing in-situ testing and laboratory experimentation. Geo-Slope software is employed to establish a simplified two-dimension model of the tailings pond and to analyze the seepage flow field. Static stability is evaluated with the limit equilibrium method while the equivalent linear method is applied to determine time-history response of the system. Calculated results reveal the dry beach length is reduced from 200 m to 90 m and the phreatic line rises by 2-3 m in the design flood. Partial liquefaction occurs in the zone from water edge to the water reservoir tip while maximum liquefaction depth is approximately 15 m under water level. The safety factor of tailings pond varies with seismic time process and the minimum safety factor is 1.5.

Keywords

Tailings Pond, Safety Assessment, Stability, Dynamic Response, Liquefaction.
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