Abstract: From sedimentation tests，the settling distance under different concentration and different settling way for a fine-grained gold tailing are measured，and then the transparent distance of discharging to the tailing pond under different pulp concentration，different settling means and different discharging pipe arrangement are calculated based on the measurement results and some related materials provided by mine.The results showed that the settling velocity of tailings at different concentrations is very low as natural subsidence.The settling velocity for tailings，especially for low concentration tailings can be increased by adding No.3 flocculants.The calculation results showed that the transparent distance in tailing pond was effectively shortened by reducing the slurry concentration，adding flocculants and large spacing tailing discharging.This result provides a basis for selecting a suitable tailing discharging disposal options for mine.

Key words: Fine-grained gold tailings, Sedimentation velocity, Transparent Distance