THE PROJECT
Mount Garnet Mine was a polymetallic operation extracting copper, silver, and zinc, operated by Consolidated Tin Mines Ltd (ASX:CSD). The underground mine utilised sublevel open stoping with waste backfill.
PSM was engaged to provide specialised geotechnical expertise to manage complex rock mechanics, underground design and the interaction between the underground mine and historical open pit. A key technical achievement was safe and efficient extraction of ore from the crown pillar located between the open pit and the underground workings.
ENGINEERING AND TECHNICAL OPPORTUNITIES
Rehabilitation of previously submerged mining sites.
Extraction of remnant pillars and execution of advanced crown pillar mining operations.
Providing geotechnical advice to manage project delivery under a restricted investment budget.
APPROACH AND INNOVATION
Recommendations on proposed stope geometry, with detailed stope notes.
Guidance on support for underground drives.
Geotechnical advice and design for the recovery or rehabilitation of drives impacted by historic fall-of-ground events.
On-site inspections and expert input on geotechnical procedures and supplementary support measures.
Assessments and design advice for crown pillar mining operations.
OUTCOMES
PSM provided critical geotechnical expertise to support successful underground sublevel open stope mining. This included quarterly site visits for assessments and recommendations, implementing innovative geotechnical solutions within the "Mount Garnet Deeps," and development of cost-optimised mining strategies tailored to meet the requirements of a dynamic junior mining company.
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