Due to the urgent nature of the threat, a rapid risk assessment will begin led by global environmental firm Tetra Tech Coffey, which prepared the report.
World’s largest copper producer blaming lower recovery levels and ore grades at the Chuquicamata site, as it also deals with fatal accidents halting some construction works.
Chile's environmental regulator issued a series of measures against the Ojos del Salado mine, alleging "over-extraction of material" could have caused the sinkhole.