Wear Regularity of Shotcrete Conveying Bend Based on CFD-DEM Simulation

To reveal the flow characteristics of shotcrete during pneumatic transportation, numerical simulation gas–solid in pipeline transportation process was carried out based on a CFD-DEM coupling method. When particle diameter increased from 7 mm to 12 mm, maximum wear depth 1.48 × 10−6 4.58 mm. With an increase diameter, increased. Moreover, position gradually concentrated fixed area with diameter. In wind speed range this study, when 42 m/s 52 m/s, 2.53 5.26 The change had little effect location pipeline. However, speed. curvature radius 200 250 decreased 5.83 4.47 300 6.58 Finally, according law and combined actual situation engineering, measures were put forward prevent or reduce degree wear.