Actual
placement of the backfill materials in the stope may be accomplished in the following
ways:
- Slushing; the backfill may be slushed directly from a waste raise to the stope area to be
filled. Usually, the waste raise leading to the stope is supplied by rail car, front-end
loader, or LHD from a waste pass or transfer raise, which is the materials source for the
entire mining area.
- Slinger belt placement; this system may use a high-speed belt and hopper supplied by
truck or LHD (Fig. 2.6). The materials may also be placed by slinger belt mounted
under a hopper. Slinger belt systems provide good compaction and relatively strong fill
if gradation of the materials is proper.