Abstract: In the current stability analysis of tailings dam， the influence of plants has not considered， resulting in difficulty to meet the objective requirements of comprehensive management of tailings pond. Taking the tailings pond in Waitoushan iron mine as an example， the plants and rhizosphere soil were sampled in the ecological remediation area. The shrub lateral fibrous root-soil composite soil mass was prepared， and its seepage coefficient and physical mechanical indexes were measured. The parameters of plant growth were measured to carry out the experiment of taproot stretch. Based on the limited equilibrium method， the seepage line and safety factors of ecological remediation tailings dam under different conditions such as normal， flood and special were calculated. The results show that the safety factors of tailings dam can be increased by 0.025~0.030 under three ecological restoration conditions， namely， no plants， plant side fibrous root reinforcement， plant side fibrous root reinforcement + taproot anchorage + plant weight. The safety factor of the tailings dam under special conditions is slightly lower than that under flood conditions， and its fluctuation trend decreases first， then increases and then decreases with the time history of earthquake. The stability evaluation results show that the tailings dam is safe and stable under three operating conditions.

Key words: Ecological remediation, Tailings dam, Root-soil composite soil mass, Stability evaluation