$810,000 Fine After Uncontrolled Plant Movement at WA Nickel Mine
A heavy plant component was unfastened during maintenance at a WA nickel operation without first being secured against uncontrolled movement. It rotated backwards, struck a worker and pinned him against the structure. The worker suffered a serious spinal injury. The operator has now been fined $810,000.
The headline number is substantial, but it is not the most useful part of the case. The real lesson is much simpler: when fasteners, pins, bolts, supports or other restraints are removed during maintenance, the task can change the plant from stable to unstable in seconds. If the work plan does not identify what is holding the component in place, what energy is stored in it, where it can move and who is in the line of fire, the risk assessment is already behind the job.
What happened at Ravensthorpe
On 06 Oct 26, WorkSafe WA reported that FQM Australia Nickel Pty Ltd had been fined $810,000 and ordered to pay $11,096.20 in costs by the Albany Magistrates Court. The prosecution arose from an incident on 18 Mar 23 at the Ravensthorpe Nickel Operation processing plant in WA.
The injured worker was carrying out maintenance on the Saprolite Stacker with two co-workers. The task involved changing a heavy plant component known as a Roman Shield. According to WorkSafe WA, the workers unfastened the Roman Shield without first securing it against uncontrolled movement. The component rotated backwards and struck the worker, pinning him against part of the structure.
The worker required spinal fusion surgery, extensive treatment and rehabilitation, and WorkSafe WA reported that he continues to experience pain and reduced mobility.
The court outcome
FQM Australia Nickel pleaded guilty to contravening sections 19(1) and 31(1) of the Work Health and Safety Act 2020 (WA). WorkSafe WA described the offence as a failure to comply with a health and safety duty which, by that failure, caused serious harm to a worker.
The regulator said the company had not instructed the workers to secure the Roman Shield before unfastening it, had not warned them about the risk of uncontrolled movement, and had not instructed them to remain clear of the potential line of fire. The Job Hazard Analysis for the task did not include those controls, and the allocated supervisor did not directly supervise the work.
ABC Great Southern separately reported that the injured boilermaker had commenced work at the mine 17 days before the incident and that one of the workers present was a supervisor who had been in the supervisory role for three days. Those details matter because competence and supervision are not generic labels. They need to match the task, the hazards and the experience of the people carrying it out.
Secondary reporting: ABC News, First Quantum Minerals fined $810k over incident that left worker with severe spinal injury
Secure it before you unfasten it
Maintenance frequently changes the energy state of plant. A component that is stable while bolted, pinned or supported can become capable of rotating, dropping, swinging or shifting as soon as that restraint is removed. That movement may be driven by gravity, counterweight forces, belt tension, hydraulic pressure, spring force or the geometry of the assembly itself.
This is why the phrase 'isolate the plant' can be too narrow if workers interpret isolation as simply switching off electrical power. A machine can be electrically dead and still contain enough gravitational or mechanical energy to kill someone. In maintenance work, the question is not only 'is it powered?' It is 'what can move?'
WorkSafe WA has previously warned in guidance on rail-mounted stackers that isolation procedures need to recognise all sources of hazardous energy, including gravitational potential energy. Its mining guidance identifies uncontrolled luffing movement, loss of structural support and movement following removal of pins or stays as hazards capable of causing workers to be struck or crushed.
Related regulator guidance: WorkSafe WA, Isolation issues with rail-mounted stackers
The line of fire is not a motivational slogan
The phrase 'line of fire' gets thrown around in industry until it starts sounding like another toolbox-talk catchphrase. The underlying principle is concrete: if stored or potential energy is released, where will the component, load, tool, material or failed restraint travel? If a person is standing in that path, the consequence can be immediate and severe.
A good task assessment should identify the credible movement path before anyone starts undoing fasteners. That includes the primary movement and any secondary movement after the component hits another structure, drops onto a support, releases tension or shifts the balance of adjacent plant.
The strongest control is not telling workers to 'be careful of the line of fire' while leaving the component free to move. The job should be engineered or physically arranged so the component is restrained, supported or blocked before the normal restraint is released. Exclusion then backs that up by keeping people out of the residual movement zone.
Why the Job Hazard Analysis matters
A Job Hazard Analysis is not useful because a form exists. It is useful when it predicts how the task changes the hazard state step by step. The critical question during a change-out is often not what the machine does in normal production, but what happens after Step 4 when a support is removed and before Step 5 when the replacement component is installed.
For maintenance tasks involving heavy components, the assessment should be specific enough to identify the point at which stability changes. Generic entries such as 'crush injury - use PPE - follow procedure' are decorative paperwork. They do not identify the energy source, movement path, restraint method, exclusion zone or verification required before the next step.
If the component relies on the fastener for stability, removing the fastener may create the hazard.
The sequence should therefore be explicit: identify what can move, secure it, establish the line-of-fire exclusion, verify the restraint, then remove the fixing. If the work cannot be performed in that sequence, the alternative method needs to control the same risk to an equivalent or higher standard.
Supervision needs to match the risk
WorkSafe WA specifically noted that the allocated supervisor did not directly supervise the work. That does not mean every maintenance task needs a supervisor staring over a tradesperson's shoulder. It means supervision should be proportionate to the risk, complexity, novelty of the task and experience of the work group.
A routine change-out performed hundreds of times by a stable and experienced team may justify one supervision model. A high-consequence task involving heavy plant, inexperienced workers or a newly appointed supervisor may justify another. Treating both situations as identical because everyone has completed an induction is an administrative shortcut, not risk management.
A useful isolation video
The incident was about uncontrolled movement and stability rather than a simple electrical restart, but the broader maintenance principle is the same: identify every energy source, isolate it where required, release or contain stored energy, and verify the safe state before work begins.
Video: WorkSafe Queensland, 'Isolating machinery when not in production'. The video is general regulator guidance and does not depict the Ravensthorpe incident.
What changed after the incident
WorkSafe WA reported that after the incident FQM Australia Nickel engaged a specialist safety consultant, developed Roman Shield-specific risk assessment procedures and work instructions, introduced more comprehensive Job Hazard Analyses and enhanced training for new employees and supervisors.
That response is worth noting because it points directly at the system elements that had to become more task-specific: how the component is restrained, how the task is assessed, how the work is instructed and how inexperienced people are supervised.
The Ravensthorpe Nickel Operation was placed into care and maintenance in Jul 24. The prosecution therefore serves as a useful case study beyond one site or one item of plant. The same failure pattern can exist in manufacturing, transport workshops, construction, warehousing, utilities and any workplace where people dismantle or maintain heavy equipment.
What I would expect to see in a maintenance system
Task-specific identification of gravitational, mechanical, hydraulic, pneumatic, electrical and other stored or potential energy.
A defined method for supporting, pinning, blocking, bracing or otherwise securing components before existing restraints are removed.
A clear line-of-fire and crush-zone assessment for each stage of dismantling and reassembly.
Positive verification that the restraint is effective before bolts, pins or supports are released.
Supervision proportionate to the task complexity, consequence and experience of the work group.
Work instructions that describe the actual sequence and critical controls, rather than relying on generic warnings.
A stop-and-reassess trigger when the physical condition of the plant differs from the planned task.
Learning from near misses and unexpected movement before the next event has a worker standing in the wrong place.
The broader lesson
The prosecution should not be reduced to 'they forgot to secure the part'. The larger systems question is whether the organisation had reliably identified the moment when maintenance removed the component's normal restraint and created a new energy state.
That is what good maintenance risk management is supposed to do. It should predict the hazardous transition before the worker reaches it. The task plan should tell the crew what has to be secured, where people must not stand, how the safe state is verified and who is supervising the critical step.
When the control exists only after the incident, the risk assessment has become an autopsy.
Safety Jon take
There is a fairly simple rule buried inside an $810,000 prosecution: if you are about to remove the thing currently holding a heavy component in place, first work out what will hold it in place afterwards.
Secure it before you unfasten it. Keep people out of the movement path. Verify that the restraint actually works. Then proceed.
It is less exciting than a new safety slogan. It is considerably more useful.
Sources and further reading
This article provides general WHS information and commentary. It is not legal, engineering or task-specific advice. Controls must be selected for the actual plant, task, workplace and jurisdiction.
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