Flow characteristics of moist-mixed materials for shotcrete: From experiment to CFD-DEM simulation

Sun, Zhenjiao; Chen, Lianjun; Ma, Guoqiang; Jian, Zhang; Zhang, Sunhao; Ma, Hui; Li, Pengcheng; Gao, Kang

doi:10.1016/j.powtec.2023.118821

Cited by 5 publications

(3 citation statements)

References 46 publications

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“…The gangue particle parameters need to be determined before particle domain calculations [41][42][43]. The funnel method was utilized to measure the particle angle of repose to calibrate the particle parameters used in the simulation [19,44]. The measurement process of the angle of repose of gangue using the funnel method is shown in Figure 6.…”

Section: Granular Domain Settingsmentioning

confidence: 99%

“…The fluidity of gangue slurry directly affects its transportation performance [18,19]. If the prepared gangue slurry's viscosity is too high, resistance in pipeline transportation is apparent.…”

Section: Introductionmentioning

confidence: 99%

“…The motion behavior of gangue slurry in the pipeline results from the interaction between gangue particles and slurry [14,21,22]. The coupled CFD-DEM method is used to solve the interaction between particles and fluid [23][24][25][26][27][28], which is very suitable for simulating the flow process of gangue slurry in the pipeline [13,19]. The CFD-DEM method has been utilized in various applications involving the coupling of fluids and solids in geotechnical engineering [29,30].…”

Section: Introductionmentioning

confidence: 99%

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Numerical Study of Gangue Slurry Deposition Behavior in Pipelines Considering Viscosity Change

Gu,

Wang,

et al. 2024

Minerals

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Pipeline conveying is a crucial method for realizing gangue slurry filling. In order to avoid the blockage of gangue slurry in pipeline conveying, it is necessary to clarify the deposition behavior of gangue particles in the pipeline. This paper analyzes coal gangue’s microstructure and mineral composition in the Zhaozhuang No. 2 coal mine through electron microscope scanning and X-ray diffraction tests. We studied the viscosity characteristics of gangue slurry at different mass concentrations and particle sizes and analyzed the change rule of viscosity of gangue slurry with time. Based on determining the nature of the slurry material, a simulation analysis of the deposition behavior of the gangue slurry in a pipeline was carried out using the coupled fluid dynamics–discrete element (CFD-DEM) method. The results show that gangue slurry with a particle size larger than 1.0 mm is likely to lead to the blockage of the pipeline. A small increase in viscosity will promote a uniform distribution of particles inside the pipeline. The deposition behavior of particles is jointly influenced by gravity, fluid interaction force, inter-particle force, and the interaction between particles and the pipeline surface. The research results can be used as a reference for the design and study of gangue slurry grouting systems.

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