Research and Application of Rheological Model of Graded Fine-Tailings Slurry Based on Constant Shear Rate
The rheological properties of tailings slurry are important parameters in filling design.Based on the specific filling conditions of a gold mine in Shandong,constant shear rate loading tests and slurry structure dynamics theory were used to study the rheological properties of graded fine-tailings slurry.The rheological model of graded fine-tailings slurry under constant shear rate was established.The linear programming theory was used to obtain the specific expressions of the rheological model when the constant shear rate was 2 s-1,20 s-1,80 s-1 and 180 s-1,and the mass concentration was 74％.The results show that the shear stress of the graded fine-tailings slurry gradually decreases with the increase of time and finally tends to be stable during the loading with constant shear rate.The rheological model of the graded fine-tailings slurry is an exponential function,and the decision coefficient R2 between the theoretical model curve and the test results is 0.9897,0.9785,0.9612 and 0.9583,respectively.The model curve fits well with the test results.The model was used to verify the rheological behavior of graded fine-tailings slurry with mass concentration of 72％and cement-sand ratio of 1∶4.The error between the theoretical calculation value and the measured value obtained by the model is less than 3％.The research results can provide a reference for the filling design of the same type of mines.
Backfill miningGraded fine-tailings slurryConstant shear rateRheological model
万方数据
维普
