unconsolidated backfill

unconsolidated backfill

The non-compacted material which is in place in a trench.
References in periodicals archive ?
Ore from the underground mines will be predominately extracted via top-down mechanized longhole open stoping, with a smaller amount mined by a bottom-up modified Avoca method using unconsolidated backfill. The majority of the underground ore is in the top 600 m and has a relatively short haul to surface.