ABSTRACT
In 2018, a remediation program was executed to stabilize the underground voids near stopes that store arsenic trioxide waste at the Giant Mine in the Northwest Territories of Canada. The shapes of the voids were reconstructed through integrating multiple cavity monitoring system surveys. A number of mix recipes of paste backfill and self-consolidating concrete (SCC) were designed with various bleeds, set times, uniaxial compressive strengths, and flow properties. Respectively, a total of 16,686 m3 and 53,389 m3 of SCC and paste were backfilled by gravity.
