AngloGold Ashanti has announced that underground ore mining at the Obuasi Gold Mine in Ghana is expected to resume by mid-October. For the remainder of 2021, underground ore will be used only to replenish the run-of-mine stockpile. Gold production from underground ore sources is therefore expected to recommence only in January 2022. The safe ramp up to the full mining rate of 4000 tpd is expected to be achieved by the end of the 1H22.

Underground mining activities at Obuasi were voluntarily suspended following a sill pillar failure on 18 May 2021 which resulted in the tragic loss of one of the company’s colleagues. A detailed review of the mining and ground management plans have been conducted by a cross-functional internal team and supported by independent third-party, Australian Mining Consultants.

Following this review, a comprehensive series of protocols has been introduced to supplement existing operating procedures. The full suite of procedures ahead of the mining front now include the existing systematic probe drilling procedure, extensive use of technology, including cavity monitoring systems and cavity auto laser system, augmented with visual inspections to confirm the position and status of backfill in previously mined areas. The new paste-fill plant has been commissioned and its reticulation system is expected to be completed by the end of 2021.

These protocols, which have been integrated into the mine operating system, will be bolstered by scheduled audits to ensure the accuracy and diligence in probe drilling, and the intended implementation of the revised plan. AMC will continue its review of future mining areas. During the review period, underground development and work related to the Obuasi Redevelopment Project continued to progress, with Phase 2 construction substantially complete at the end of June 2021.

AngloGold Ashanti Obuasi Gold Mine in Ghana to Resume

Strategic Research Institute

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