Study on the Stability of the Stacking Dam of Jiaoyishan Phosphogypsum Slag Field
The stability of the stacking dam is very important to ensure the safety of the tailings reservoir.The stability of the stacking dam of Jiaoyishan phosphogypsum slag field was studied by means of engineering investigation data analysis,stability calculation and numerical simulation.The results are concluded as follows.When the elevation of the stacking dam is 942 m,the stability coefficients under normal and flood conditions meet the requirements of the specifications,and the dam failure is very likely to occur under the condition of seepage failure.When the elevation of the stacking dam is 998 m,the dry stacking of phosphogypsum is stored at a total slope ratio of 1∶2.5,and the dam body is in an unsafe state.It is feasible to heighten the stacking dam of Jiaoyishan phosphogypsum slag field in the form of dry stacking.The density of dry stacking phosphogypsum should be 1.32 g/cm3.The total external slope ratio of the stacking dam should be 1∶2.6,and the seepage discharge of the dam body and the monitoring of the saturation line should be strengthened.The research results can provide a reference for the heightening of the stacking dam of phosphogypsum slag field at home and abroad.
Slag fieldPhosphogypsumStability of stacking damNumerical simulation
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