To solve the problem of poor self-flowing performance of the large capacity super fine tailing slurry in overlength pipeline transportation, this paper studies the self-flowing transportation, the hindered settling and the frictional resistance loss properties of the super fine tailing slurry. A pipeline model is built and the evaluation is made through the simulation software Fluent. It is revealed that the super fine tailings are easy to suspend and the large-tube pipeline transportation is beneficial to reducing the frictional resistance loss. With the working flow rate of 2.95 m·s^-1, the pipeline's inner diameter of 155 mm, the vertical component of the fluctuating velocity reaches 0.24 m·s^-1, which is far greater than the hindered settling rate of 0.034 m·s^-1, and the maximum stowing gradient is up to 10.6.

large capacity backfill system  /  super fine tailings  /  overlength pipelines  /  self-flowing transportation