Computational fluid dynamics study on cemented paste backfill slurry: Review

Dong, Huizhen; Aziz, Nuraini Abdul; Shafri, Helmi Zulhaidi Mohd; Ahmad, Kamarul Arifin

doi:10.1016/j.conbuildmat.2023.130558

Cited by 20 publications

(4 citation statements)

References 109 publications

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“…Therefore, the mixing of the two kinds of tailings is used to improve the gradation. It exhibits excellent workability characteristics during filling operations and is highly resistant to segregation and bleeding [30].…”

Section: Mixing Tailings Aggregate Ratio and Particle Gradation Chara...mentioning

confidence: 99%

“…Therefo of the two kinds of tailings is used to improve the gradation. It exhibits ex bility characteristics during filling operations and is highly resistant to se bleeding [30]. In order to determine the ratio range of OT and GT, according to the properties of the two tailings, the two-dimensional compaction theory is use as shown in Equation (1) [31].…”

Section: Mixing Tailings Aggregate Ratio and Particle Gradation Chara...mentioning

confidence: 99%

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Study on Correlations between Tailings Particle Size Distribution and Rheological Properties of Filling Slurries

Zhang,

Wang,

2023

Minerals

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The influence of the mass concentration and particle size distribution on rheological parameters and slump was investigated by analyzing the mixture of overflow tailings (OT) and classified tailings (CT). The correlation between the rheological parameters, slump and characteristic value of the tailings particle diameter was discussed. Finally, the ratio parameters of a mixed tailings filling slurry were optimized using a lead–zinc mine in Guangdong, China as the engineering background. The results showed a quadratic decrease in the slump of the tailings slurry as the mass concentration increased, while the slump decreased with a decreasing particle size. With the increase in the mass concentration, the yield stress of the tailings slurry follows a quadratic function, while the plastic viscosity exhibits linear growth. The influence of tailings fine particles on the sensitivity of the yield stress and plastic viscosity to the mass concentration is reduced as their content increases. The yield stress and plastic viscosity of the tailings slurry exhibit a quadratic function decrease and linear growth as the slump increases. The slump of the tailings slurry is related to the particle size characteristic value and the mass concentration of the slurry. The correlation coefficient between the yield stress and the aggregate characteristic particle size increases most obviously at d10~d50, and the increase in the characteristic particle size will enhance the correlation between the yield stress and particle gradation. The correlation coefficient between the plastic viscosity and aggregate particle gradation parameters exhibits an initial increase followed by stabilization with an increasing characteristic particle size, with the most significant increase observed at d10~d50.

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Section: Mixing Tailings Aggregate Ratio and Particle Gradation Chara...mentioning

confidence: 99%

Section: Mixing Tailings Aggregate Ratio and Particle Gradation Chara...mentioning

confidence: 99%

Study on Correlations between Tailings Particle Size Distribution and Rheological Properties of Filling Slurries

Zhang,

Wang,

2023

Minerals

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“…Figures 15 and 16 show examples of typical flowsheets for underground mine backfill plants with cemented paste backfill applied in Peru considering Batch operation and continuous operation, respectively. According to the consistency and rheology of non-Newtonian behavior of the underground mine fill material made up of cemented paste backfill, a material with complex According to the consistency and rheology of non-Newtonian behavior of the underground mine fill material made up of cemented paste backfill, a material with complex hydraulic behavior can be obtained to be transported through pipelines [59][60][61]. Due to the high viscosity, the high yield stress of the material being of the order of at least 125 Pa, and demanding pumping pressure requirements of the order of 125 Bar (12.5 MPa) in some cases, the use of positive displacement pumps is required (PD Pumps) [12].…”

Section: Cemented Paste Backfillmentioning

confidence: 99%

Experiences of Underground Mine Backfilling Using Mine Tailings Developed in the Andean Region of Peru: A Green Mining Solution to Reduce Socio-Environmental Impacts

Cacciuttolo,

Marinovic

2023

Sustainability

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In Peru, socio-environmental conflicts related to the development of mining-metallurgical processes and the responsible disposal of mine tailings have become central issues for accepting mining projects, especially regarding building relationships of trust with the communities. This condition has prompted the Peruvian mining industry to advance in managing alternatives to the conventional surface disposal of mine tailings. A promising and increasingly popular management strategy for mine tailings in Peru is their disposal inside underground mines. This article presents: site-specific conditions, advantages/disadvantages, and lessons learned from practical experiences of mine tailings disposal in underground mines in Peru. In addition, some techniques are highlighted, such as (i) hydraulic fill, (ii) cemented hydraulic fill, and (iii) cemented paste backfill. Finally, this article concludes that the responsible disposal of mine tailings in underground mines is a green mining solution that reduces negative socio-environmental impacts, limiting the generation of acid rock drainage (ARD) and the leaching of metals due to the decrease in contact with oxygen and rainfall, thus mitigating the contamination of surface and underground waters, reducing the footprint of affectation in the territory, and eliminating the emission of particulate matter in the environment.

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“…The technology decreases cement usage, drastically reducing filling and mining expenses, and therefore, features the advantages of economy, safety, and environmental protection [14][15][16]. Paste in the pipeline in the form of a high-concentration structural flow medium exhibits a complex rheological behavior and flow mechanism, falling within the realm of multidisciplinary cross-discipline research [17,18]. Further research into the technological parameters of paste filling is urgently needed to achieve excellent transportation performance and mechanical properties of the paste slurry [19,20].…”

Section: Introductionmentioning

confidence: 99%

Research on Slurry Flowability and Mechanical Properties of Cemented Paste Backfill: Effects of Cement-to-Tailings Mass Ratio and Mass Concentration

Li,

Fu,

Yang

et al. 2024

Materials

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The flowability and mechanical properties are increasingly crucial in the filling process of deep metal mines with mining depths exceeding 1000 m. The rheological properties of filling slurry in the pipeline were analyzed through rheological tests, L-tube self-flow tests, and semi-industrial loop tests. The results revealed that with an increase in the cement-to-tailings mass ratio (c/t ratio) and mass concentration, the slurry exhibited a higher flow resistance and decreased stowing gradient. During slurry transportation, the pressure loss in the straight pipe was positively correlated with the slurry flow rate, c/t ratio, and mass concentration. A uniaxial compressive strength (UCS) test was conducted to analyze the mechanical properties of the cemented paste backfill containing BMC (CCPB) in both standard and deep-underground curing environments. The UCS of the CCPB showed an increasing trend with the rise in curing age, mass concentration, and the c/t ratio. The comprehensive analysis concluded that when the c/t ratio is 1:4, and the mass concentration is approximately 74%, and parameters such as the slump, bleeding rate, and flowability of the filling slurry meet the criteria for conveying and goaf filling, resulting in a high-strength filling body.

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Computational fluid dynamics study on cemented paste backfill slurry: Review

Cited by 20 publications

References 109 publications

Study on Correlations between Tailings Particle Size Distribution and Rheological Properties of Filling Slurries

Study on Correlations between Tailings Particle Size Distribution and Rheological Properties of Filling Slurries

Experiences of Underground Mine Backfilling Using Mine Tailings Developed in the Andean Region of Peru: A Green Mining Solution to Reduce Socio-Environmental Impacts

Research on Slurry Flowability and Mechanical Properties of Cemented Paste Backfill: Effects of Cement-to-Tailings Mass Ratio and Mass Concentration

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