Backfill Solutions

Our mine backfill capabilities include:

• Dry rock fill
• Hydraulic fill
• Paste fill (most projects)

Paste backfill is mainly used to stabilize underground excavations. A mix of paste and cement is pumped into previously mined stopes to form a rock solid material. The paste backfill supports for example the walls of adjacent adits as mining progresses. This way the mine can be utilized to a maximum since it makes it possible to mine all of the ore deposit.

The paste backfill can also serve as a working platform in a mine. In short, by using paste backfill the mines can be utilized more efficiently and safely.

Since the cost of the binding material is essential for the competitiveness of paste backfilling, Outotec’s expertise in optimizing the consistence of the paste can be crucial.

The mix variables must always be optimized to provide a backfill material that exactly meets the demands of the individual project.