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• W4200206342 abstract "This work is aimed at revealing the mesophysical process and mechanical behaviors of fine-grained tailing sand during seepage failure. The macroscopic seepage tests combined with posttest X-ray computed tomography (CT) were employed to study the fractal characteristics of mesostructure. Results show that before and after the seepage failure of fine-grained tailing sand, fractal of pore distribution ( <math xmlns=http://www.w3.org/1998/Math/MathML id=M1> <msub> <mrow> <mi>D</mi> </mrow> <mrow> <mtext>pd</mtext> </mrow> </msub> </math> ) and fractal dimension of pore size ( <math xmlns=http://www.w3.org/1998/Math/MathML id=M2> <msub> <mrow> <mi>D</mi> </mrow> <mrow> <mtext>ps</mtext> </mrow> </msub> </math> ) show a relatively obvious positive correlation with porosity. Tailing particles migrate along the seepage direction during the seepage process, resulting in the gradual decrease of <math xmlns=http://www.w3.org/1998/Math/MathML id=M3> <msub> <mrow> <mi>D</mi> </mrow> <mrow> <mtext>pd</mtext> </mrow> </msub> </math> and pore distribution area. The <math xmlns=http://www.w3.org/1998/Math/MathML id=M4> <msub> <mrow> <mi>D</mi> </mrow> <mrow> <mtext>ps</mtext> </mrow> </msub> </math> reflects the variation characteristics of pore number distribution with different pore sizes. The increase in <math xmlns=http://www.w3.org/1998/Math/MathML id=M5> <msub> <mrow> <mi>D</mi> </mrow> <mrow> <mtext>ps</mtext> </mrow> </msub> </math> leads to a decrease in the uniformity of pore size and an increase in the size difference between pores. The mass fractal dimension ( <math xmlns=http://www.w3.org/1998/Math/MathML id=M6> <msub> <mrow> <mi>D</mi> </mrow> <mrow> <mi>m</mi> </mrow> </msub> </math> ) of fine-grained tailing sand samples ranges from 1.6472 to 1.8256. With the increase of <math xmlns=http://www.w3.org/1998/Math/MathML id=M7> <msub> <mrow> <mi>D</mi> </mrow> <mrow> <mi>m</mi> </mrow> </msub> </math> , the coefficient of uniformity ( <math xmlns=http://www.w3.org/1998/Math/MathML id=M8> <msub> <mrow> <mi>C</mi> </mrow> <mrow> <mi>u</mi> </mrow> </msub> </math> ) of tailing sand tends to increase. The <math xmlns=http://www.w3.org/1998/Math/MathML id=M9> <msub> <mrow> <mi>D</mi> </mrow> <mrow> <mi>m</mi> </mrow> </msub> </math> method can discern the seepage failure type of fine-grained tailing sand, and it is more accurate than the traditional method. This study provides a reference for the prevention and control of the seepage failure of tailing dam." @default.
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• W4200206342 date "2021-12-21" @default.
• W4200206342 modified "2023-10-16" @default.
• W4200206342 title "X-Ray CT Investigation on Fractal Characteristics of Fine-Grained Tailing Sand in Fujian’s Makeng: Insight into the Mesoscopic Seepage Failure" @default.
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• W4200206342 doi "https://doi.org/10.1155/2021/3615333" @default.
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