8.2.4 Fiil Fences
To minimize the amount of backfll! to be placed, fill fences 10 m wide by 6 to 18 m high are placed between pillars (Figure 8.5). The fences are constructed on top of the backfill once 3 m of fill material has been placed. Fences are built in &m lifts, which is the
maximum height that the equipment can reach. The steps used in
fence construction are as follows.
1. Anchor bolt holes, 3.8 cm in diarnetct and