Abstract: At present, a mine uses natural graded coarse tailings from vertical tailings silos to self-flow cementation filling, poor filling effect.It is proposed to use crude tailings paste-Like backfilling to fill the body to solve the large volume of bleeding, long solidification time, strength low-level questions.The mine tailings slurry in the mass concentration 72%~74% can reach paste (paste-like) state.The pipe flow resistance is an important parameter of the slurry conveying pipeline.In order to explore the transport characteristics of the crude tailings paste-like backfilling in the mine, the pipe flow resistance and rheological parameters were determined by L-pipe test.The test results show that the crude tailings paste-like slurry of the mine has certain anti-segregation ability at the mass concentration 72%~74%, and can be transported long distances in the project; with the increase of the mass concentration of the slurry, the flow resistance obviously increases, and the slurry flow rate and the smooth delivery of filling gradient reduced; in pipe diameter 100 mm, the smooth delivery of filling gradient was about 2.26~3.02.