Simulation and test of the movement process of mixed flow composed of slurry and coarse particle

Abstract

Mixed flow composed of coarse particle and mud is a common mountain disaster. Because of its typical granular material characteristics, fluid theory based on continuum hypothesis is difficult to describe discontinuous deformation. Therefore, the rotary shear and normal bonding experiments of clay mud are carried out by MCR301 to determine the mechanical parameters of the normal and the tangential direction of the mud (131% moisture content). According to the theory of granular material, with PFC3D as the platform, write the numerical viscosity slope model test programme, according to the mud test results, set the parameters of the numerical model, reproduction process and the discontinuous deformation phenomenon, and is verified by the same size physical model test. The results show that the PFC3D discrete element method based on granular material theory can well reproduce the movement process and discontinuous deformation phenomenon of the coarse particle mud mixing flow slope, and provide a new way for in-depth analysis of the complex landslide movement process.

Keywords:

• Mixed flow of particle and mud
• numerical simulate
• model experiment
• discrete element method

Acknowledgement

The authors thank the anonymous reviewers for their comments, which have significantly helped to improve this paper.

Disclosure statement

No potential conflict of interest was reported by the authors.

Funding

This work was supported by National Natural Science Foundation [grant nos. 41672357, 41372331, and 51679229], Henan Provincial Department of Science and Technology Research Project [grant nos. 182102310779 and 162102310253].

Figure 8. Numerical and physics experiment model of viscous debris flow.

Figure 9. Mixture of coarse and viscous mud.

Figure 10. The morphology of the numerical simulation of the motion of the coarse particle mud mixture.

Figure 11. The front comparison between numerical simulation and physical model experiment about viscous debris movement.

Figure 12. The morphology of the numerical simulation of the motion of the coarse particle mud mixture.

Figure 13. The front comparison between numerical simulation and physical model experiment about viscous debris movement.

Additional information

Funding

This work was supported by National Natural Science Foundation [grant nos. 41672357, 41372331, and 51679229], Henan Provincial Department of Science and Technology Research Project [grant nos. 182102310779 and 162102310253]