Fatigue slows reaction times, narrows attention and, at its worst, causes microsleeps of a few seconds. In a haul truck or a loader, a few seconds is enough for a serious incident.
No single measure solves fatigue. The sites that manage it best combine good rostering and rest with technology that detects fatigue in real time, and with a response that people trust. This guide covers both.
What causes fatigue in mining
- Long shifts and extended work weeks.
- Night work and rotating rosters that disrupt sleep.
- Sleep debt that builds across a roster cycle.
- Monotonous tasks such as repetitive haul cycles in a quiet cab.
- Long commutes and poor rest facilities on remote sites.
What Ghana's regulations say about working time
L.I. 2182 regulation 510 says a manager or small-scale mining licence holder must not permit a person to work in an underground mine for more than eight hours in 24 hours or 40 hours in seven days, or at the surface for more than eight hours in 24 hours or 45 hours in seven days, except for work necessary for mine safety or of an emergency or special nature. Regulation 291(b) also restricts the working hours of a person in charge of a mechanical appliance that needs constant supervision, unless the manager gives written permission.
These limits are an important foundation. They cannot tell a supervisor that a particular operator is struggling to stay awake at that moment, which is where detection technology helps.
This is a plain-language summary for general information, not legal advice. Regulation numbers refer to L.I. 2182. Always check the current regulation text and Minerals Commission guidance for your operation.
A layered approach to fatigue
- Plan: roster to limit consecutive long shifts and night work, and give enough recovery time.
- Prepare: fit-for-work checks and clear rules for reporting tiredness without penalty.
- Detect: in-cab cameras and wearable sensors that identify fatigue and distraction as it happens.
- Respond: a defined process after an alert, such as a safe stop, a break, a relief operator or a conversation with the supervisor.
- Learn: analyse alerts by shift, time of day and location to improve rosters and routes.
How fatigue detection technology works
- In-cab camera systems monitor the operator's face and head for signs such as prolonged eye closure and distraction, and alert the operator and the control room.
- Wearable sensors measure physiological signals, such as EEG-based devices that track alertness.
- Analytics combine alerts and shift data to show where fatigue risk concentrates.
No system is perfect. Lighting, protective eyewear and operator behaviour can affect camera performance, so detection works best alongside the planning and response steps above and should be tested on your own machines.
Privacy and trust
Camera and wearable data about named operators is personal data. Under Ghana's Data Protection Act, 2012 (Act 843), decide and communicate the purpose, who can see the data and how long it is kept before go-live. Involve operators early. A system that is seen as surveillance will be resisted. One that is seen as protecting people will be used.
Frequently asked questions
Do working-hour limits remove the need for fatigue monitoring?
No. Limits reduce exposure, but fatigue also depends on sleep, the time of day and the task. Real-time detection covers the gap between the limits and what is happening to an individual operator.
What should happen after a fatigue alert?
The response should be agreed in advance. Typical actions include stopping safely, taking a break, swapping the operator and a supervisor check-in, with the event recorded for analysis.