Study on the diffusion and deposition law of pore slurry in gangue filling zone based on CFD-DEM coupling
Zhongkui Ji, Lijun Gao, Shuquan Guo, Kui Sun, Wanchao Ma, Boqiang Wu, Xiaoyuan Xue, Pan Chen, Muhammad Shakaib, Muhammad Shakaib, Muhammad Shakaib, Muhammad Shakaib, Muhammad Shakaib
TL;DR
This study uses simulations and experiments to understand how slurry spreads and settles in coal gangue cavities, showing how grouting speed affects the process.
Contribution
The study introduces a CFD-DEM coupling method to analyze slurry diffusion and particle settlement in gangue filling zones.
Findings
Particle settlement follows a bell-shaped curve, revealing key insights into movement and settling behavior.
Grouting speed significantly impacts particle settlement and diffusion range, doubling with increased speed.
Slurry and particle velocities decrease rapidly at first and then slow down with increasing grouting distance and depth.
Abstract
In this study, the slurry diffusion in a cavity filled with coal gangue was studied by combining experimental and numerical simulation methods. By calibrating slurry and particle materials, the grouting process in coal gangue filling area is simulated successfully, and the change of slurry diffusion flow field and particle movement and settling process in different dimensions are deeply analyzed. Both experimental and numerical simulation results show that the particle settlement presents a bell-shaped curve, which is of great significance for understanding the particle movement and settlement behavior in the filling cavity. In addition, it is found that the grouting speed has a significant effect on the particle settlement during the slurry diffusion process. When the grouting speed increases from 0.1m /s to 0.2m /s, the particle settlement and diffusion range increases about twice. In…
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Taxonomy
TopicsGrouting, Rheology, and Soil Mechanics · Rock Mechanics and Modeling · Landslides and related hazards