waste filling

waste filling

[′wāst ‚fil·iŋ]
(mining engineering)
Material used for support in heavy ground and in large stopes to prevent failure of rock walls and to minimize or control subsidence and to make it possible to extract pillars of ore left in the earlier stages of mining; material used for filling includes waste rock sorted out in the stopes or mined from rock walls, milltailing, sand and gravel, smelter slag, and rock from surface open cuts or quarries.
References in periodicals archive ?
Add in glue bottles, old test papers and left-over lunch, and it's no wonder schools are looking for ways to reduce both the amount of waste filling trash bins and the money spent to have it hauled away.
8 years of capacity at a rate of 250,000 tons per year, waste filling in Phase IV would not begin for 4 to 5 years after filling begins in Phase III.
Waste filling 1,736 cages has been taken from 155 stores to date, said Nisa distribution director Jonathan Stowe.
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