backfill

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backfill

In construction and excavation work,to fill something with additional dirt.When building foundation walls or retaining walls,one excavates a space large enough to build the walls and provide a comfortable work space,and then backfills with additional rock and dirt afterward.

References in periodicals archive ?
All ore mined at the San Acacio was oxide ore and the dumps and backfills are considered, metallurgically, to be representative of unexplored and unmined ore in the mine.