Why mine ventilation needs more than technology

South Africa’s mining sector finds itself at a critical crossroads, where the growing complexity of deep-level operations, tightening health and safety demands, and rising operational costs are converging to force a fundamental rethink of mine ventilation.

The real question is not whether mines should adopt more technology, but whether they can apply it with enough engineering discipline, instrumentation reliability, and operational support to make ventilation systems safer, more responsive, and more cost-effective. The industry therefore needs ventilation strategies that are purposeful, cost-aware, and genuinely suited to the realities of modern mining.

Power inevitably becomes a central consideration, because it underpins both ventilation and refrigeration, the two systems that make deep‑level mining possible. While they may sometimes be viewed as unavoidable cost centres, they are in fact fundamental enablers of mining operations. Without ventilation, you do not have a mine; without cooling, people cannot be sent underground safely.

Mining companies may aspire to fully autonomous extraction, but that remains a future objective rather than the current operating reality. Even in a highly automated mine, ventilation and cooling remain essential to protect both people and equipment. Ventilation and cooling strategies, therefore, remain fundamental to creating a workable underground environment, and they come at a high cost. Ventilation alone accounts for a significant share of a mining company’s energy bill, even if the exact percentage varies from operation to operation.

Inherent complexity

A mine’s ventilation system is inherently complex, and technology only adds value when it is properly applied. Even with something like Ventilation-on-Demand (VOD), success depends on having a clear, well-engineered strategy. Without one, mines will not achieve the expected efficiencies and may even compromise safety.

However, ventilation is not just an operational expense; it is a critical safety management system. Mining companies know that if they cannot mine safely, they cannot mine at all. This is why an engineering‑led approach is essential, focusing on strategy first and technology second, ensuring the system enhances safety and delivers real value rather than complexity for its own sake.

Real‑time monitoring is becoming increasingly important in modern ventilation systems. Traditional PLC or SCADA platforms are designed to track specific processes within a plant, but ventilation is different, as it spans the entire mine. To manage it effectively, mines need visibility of what is happening across the whole operation, not just isolated components.

The more real‑time information there is about underground conditions and how the ventilation system is performing, the more effectively management can respond. This improves safety, reduces unnecessary production stoppages, and allows the timely withdrawal of personnel when required.

Significant challenges

Critically, mines face significant challenges as ventilation systems become more connected, automated, and data-driven. IoT-enabled instrumentation, advanced control systems, and AI all depend on reliable data from a vast, harsh, and constantly changing underground environment. In mining, maintaining that data quality through accurate, functioning instrumentation is an ongoing challenge.

Every sensor must be mapped, integrated with PLCs, updated as the mine expands and, crucially, maintained. Dust, blasting, vehicle movement and general wear can easily foul or damage instrumentation, leading to poor‑quality data. And that is the real risk: complex systems making decisions based on data that no longer reflects the underground reality.

When an automated system interprets this faulty data as fact, it can make the wrong call, reducing airflow where it is needed, failing to detect hazardous conditions, or triggering unnecessary interventions. In practice, this forces engineers to override the automation and revert to manual control, eroding trust in the system and undermining the efficiency gains it was meant to deliver.

Grounded in reality

Ultimately, the challenge is not the technology itself, but ensuring the underlying instrumentation is robust, reliable, and continuously maintained so that the system’s intelligence is grounded in accurate, real-world data.

Technology has become embedded in mining to the point where even today’s “basics” would have been considered advanced a decade or two ago. As mines continue to rely on digital systems to improve safety, efficiency, and operational performance, the need for skilled people only grows.

More technology means more complex inputs, greater engineering judgement, and more disciplined decision‑making. Engineers and technical support teams therefore remain central to ensuring that these systems are correctly designed, correctly applied, properly maintained, and able to deliver meaningful value.

At the same time, the industry is already exploring how AI can be integrated into mining operations, including ventilation. While current applications are still in the early stages of adoption, it is clear that AI can support better decisions, reduce costs and enhance safety.

The question now is not whether AI will find its place in mining, but how far it will extend, and where additional safeguards will be needed, particularly in safety‑critical systems.