Improving fragmentation, explosive energy retention, and safety performance in a major underground mining operation.
A large‑scale underground mining operation faced persistent challenges with blast performance, including poor fragmentation, excessive oversize material, and occasional fly‑rock events. These issues led to increased secondary breakage, higher fuel consumption in the load‑haul cycle, and elevated safety risks.
Traditional plugging methods were inconsistent, allowing explosive energy to escape through the blast hole collar, reducing effectiveness and creating hazardous conditions.
Thuthuka Mining Services introduced the PowerPlug – a purpose‑built, high‑retention plug designed specifically for small‑diameter blast holes. The device securely contains explosive energy, directing it into the rock mass rather than dissipating through the collar.
The deployment covered multiple development ends over a three‑month trial period, with operator training and integration into existing blast design workflows.
Post‑blast fragmentation analysis using digital imaging showed a consistent reduction in oversize (+600mm) material, directly correlating with reduced downtime at the grizzly and crusher.
Fly‑rock incidents dropped significantly during the trial period. The PowerPlug’s energy‑retention design reduced the risk of unexpected ejection, improving overall blast safety metrics.
The PowerPlug deployment demonstrated that simple, engineered solutions can deliver substantial operational improvements. By confining explosive energy more effectively, mines can achieve better fragmentation, lower costs, and improved safety without changing blasting agents or redesigning patterns.