Abstract: The cemented backfilling technology with total directly discharged tailings has eliminated the disadvantages in the previous dry backfilling and wet backfilling technologies. The paper presents the size composition of Jinling Iron Mine' s tailings, the proportioning of the tailings used as backfill material and the backfilling system, process and capacity, and highlights the safety and quality management in the backfilling, where water filtering measures such as drill hole water drainage, water source drainage and wall piping were adopted and a closed retaining wall was built. The 0.2 million m3 mined-out area was backfilled reliably and safely in four months. This technology can facilitate the recovery of residual pillars and ore pillars and reduce the tailings pollution to the environment.

Key words: Cemented backfilling, Confined retaining wall, Water filtration, Safety management