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• W4224215363 abstract "The sedimentary structure is important for the engineering design, operation, and safety evaluation of tailing dams. For upstream-method tailing dams, tailing slurry flows and deposits in the pond and forms a complex dam structure. Ore drawing parameters (e.g., slurry concentration and flow rate) have significant influence on the sedimentary structure of tailing dams. However, there is a lack of unified and quantitative understanding of the complicated effects of ore drawing parameters on the deposition behaviour of tailings. In the present study, flume tests were applied to investigate the characteristics of the sedimentary structure of tailing dams. Seven ore drawing experiments were conducted to simulate different slurry concentrations and flow rates. The distribution of characteristic particle sizes <math xmlns=http://www.w3.org/1998/Math/MathML id=M1> <msub> <mrow> <mi>d</mi> </mrow> <mrow> <mn>50</mn> </mrow> </msub> </math> and <math xmlns=http://www.w3.org/1998/Math/MathML id=M2> <msub> <mrow> <mi>d</mi> </mrow> <mrow> <mn>10</mn> </mrow> </msub> </math> of sediment was obtained. Furthermore, considering two dominant features of particle size distribution, a mathematical model for the equation between characteristic particle size and deposition distance was established. The exponential part of this equation describes the decreasing trend of the characteristic particle size, and a smooth step function is introduced to characterize the abrupt decrease in particle size. The experimental data of <math xmlns=http://www.w3.org/1998/Math/MathML id=M3> <msub> <mrow> <mi>d</mi> </mrow> <mrow> <mn>50</mn> </mrow> </msub> </math> and <math xmlns=http://www.w3.org/1998/Math/MathML id=M4> <msub> <mrow> <mi>d</mi> </mrow> <mrow> <mn>10</mn> </mrow> </msub> </math> in all these test cases can be approximated by the equation with correlation coefficients <math xmlns=http://www.w3.org/1998/Math/MathML id=M5> <msup> <mrow> <mi>R</mi> </mrow> <mrow> <mn>2</mn> </mrow> </msup> </math> greater than 0.861. As the slurry concentration of ore drawing increases, the hydraulic sorting gradually weakens. The characteristic particle size distribution curves corresponding to a larger flow rate are generally located above those corresponding to a small flow rate, indicating that the larger the flow rate is, the coarser the sediment. This study provided useful information for the determination of ore drawing parameters in actual tailing dams. The mathematical model of tailings’ particle size distribution can be further used for refined modelling of tailing dams, so as to analyse the safety and stability of the dams." @default.
• W4224215363 created "2022-04-26" @default.
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• W4224215363 date "2022-04-21" @default.
• W4224215363 modified "2023-10-14" @default.
• W4224215363 title "Experimental Characterization of the Influence of Ore Drawing Parameters on Tailing Deposition" @default.
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• W4224215363 doi "https://doi.org/10.1155/2022/7963836" @default.
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