Mining Condition Monitoring in South Africa

Start with the service the mine needs to preserve

A conveyor drive, dewatering pump and processing-plant fan can all be important for different reasons. Record what happens when each asset becomes unavailable, what standby or alternative capacity exists and how restoration is organised. Include the effect on adjacent equipment and the work needed to reach the asset. This creates a practical basis for choosing the first monitoring points.

Review the proposed list with operations, maintenance and the mine's engineering team. A component may have a long replacement lead time while another can be changed during a routine window. Criticality therefore needs the actual spare, repair route and access information, as well as the production consequence. The initial scope should identify which decision better condition evidence can support for each selected asset.

Link the fault question to a feasible response

Use work orders, inspection findings and the maintenance team's experience to identify recurring problems. Record which explanations were confirmed and which remain hypotheses. A history of repeated bearing replacement may require more operating context than an additional overall vibration trend. Define what evidence would trigger a check, specialist review or planned intervention before choosing the sensor package.

Ask how much time the team needs to organise that response. Parts availability, isolation arrangements, lifting equipment and contractor access can determine whether an observation is actionable. The monitoring plan should retain those constraints with the asset record. The useful review frequency and escalation process follow the maintenance question and the available response, rather than a generic promise of a fixed warning period.

Build a measurement plan for the complete asset train

Identify the motor, coupling, gearbox, bearings and driven equipment that form the train. Retain the relationship between individual measurement points and the maintenance-system asset identifier. Record speed range, duty, load and relevant process states. This allows a reviewer to distinguish a change in machine behaviour from a change in the conditions under which it operates.

Vibration, temperature and electrical observations can be combined with suitable process information. A pump may need suction or discharge context; a conveyor drive may need running and load information; a fan may need the operating state that explains a changed trend. The pump condition-monitoring service develops the pump-specific measurement and review questions. Each selected asset should have an equally clear reason for its proposed points.

Review the installation against the mine's actual areas

Provide the location, environmental exposure, area classification information and applicable site equipment requirements for each proposed point. The mine's responsible engineering team reviews the selected equipment and the installation evidence against the intended use. Retain the approved model, accessories and configuration with the point register. A change in location or equipment should trigger the relevant site review before installation proceeds.

The survey should cover mounting access, guarding, dust, water exposure, ambient conditions and the route for cables or antennas. Record the permitted work windows and the site people who arrange access and isolation. Installation planning needs these details early, particularly where a shutdown, scaffold, lifting arrangement or specialist contractor is required. Equipment selection and the safe execution of site work belong in the same delivery plan.

Make measurement points repeatable through maintenance

Choose the surface, orientation and mounting method with the measurement objective and equipment documentation in mind. Photograph the accepted point and retain its identifier. The technician who returns after an overhaul needs to know which part of the train was measured and how the sensor was fitted. A changed mounting arrangement can alter the record and should be documented before comparing the new trend with the old one.

Include practical service access in the design. Identify how a battery, instrument or cable will be replaced and how the configuration will be restored. Consider exposure to moving material and routine cleaning or maintenance activity. The project should leave a usable point register that connects the physical installation, source signal, report label and maintenance asset, so troubleshooting does not depend on the memory of the original installer.

Specify acquisition independently of the radio link

For each measurement, state the acquisition rate, duration, calculated quantities and reporting interval that the selected equipment supports in the proposed configuration. A periodic summary and a detailed waveform provide different evidence to the reviewer. Confirm what records can be retained and exported, and what additional observation is available when a trend requires investigation.

The wireless vibration specification guide provides an enquiry worksheet for these choices. Use it with the machine's speed range and the specialist's review method. LoRaWAN or 4G communications then carry the agreed workload through the site architecture. The fact that a value reaches the platform establishes delivery; acceptance must also verify that its acquisition and interpretation suit the maintenance question.

Match communications to the installed locations

Review the path from each endpoint to the gateway or other approved onward connection. Include plant structures, changing material conditions, enclosures and the equipment positions that will actually be used. A trial in an accessible area does not establish performance at every proposed point. Record the representative and difficult locations, the radio configuration and any conditions still requiring a field test.

Specify power, local retention and backhaul responsibilities with the site's communications team. Test the behaviour during an approved interruption and identify which records become available after recovery. A fresh dashboard value and a complete retained history are different acceptance results. The LoRaWAN survey checklist helps document endpoint delivery and freshness where that architecture forms part of the installation.

Establish operating baselines with the asset owner

Observe the conditions the monitoring scope needs to represent: relevant speeds, loads, running states and, where useful, starts or transitions. Retain the source of that operating context alongside the measurements. Have the maintenance or reliability owner assess whether the asset's known condition provides an appropriate baseline. A stable record can still describe a machine with an existing defect.

Use different operating categories where the equipment's normal behaviour changes with duty. Review changes after maintenance, component replacement or revised operating practice before adopting a new baseline. Keep the previous record and the reason for the update. This gives the team a traceable way to interpret changes over time and prevents a configuration adjustment from silently rewriting the reference used for an earlier decision.

Route alerts to a named review and work process

Agree alert criteria and review priorities with the people responsible for the assets. A notification should carry the asset and point identifiers, event time, measured change, operating context and relevant data-quality information. Identify the first reviewer, the escalation route and the evidence needed to request additional measurements or site inspection. The report should make unresolved events visible to the responsible team.

The review result should lead to a recorded decision: continue observation, obtain specialist analysis, inspect during an available window or raise a work request. Retain the decision owner and the work-order reference where one exists. The mine's engineering and operational authority determines the intervention through its approved process. Monitoring supplies the evidence and workflow context needed to make that decision with a clear record.

Connect the finding with the shutdown and spare-parts plan

An actionable finding needs a practical work package. Record the component, inspection requirement, parts availability, access arrangements and the proposed maintenance window. If the team elects to continue operating while obtaining more evidence, retain that decision and its review condition. The same event history should be available to the person handing over to the next shift or planning team.

After the work, connect inspection findings and the subsequent measurements to the original event. Compare relevant operating conditions before drawing a conclusion about the change. If the suspected problem was not confirmed, keep that outcome as well. These records help the mine refine its measurement choices and review rules, while distinguishing observed maintenance results from assumptions about failures or downtime that might have occurred.

Verify the installed scope and the people who use it

Agree tolerances, observation periods and the conditions represented before commissioning. Use authorised simulation for workflow tests where a real abnormal condition would be inappropriate. Record what was observed directly, what was simulated and what remains untested. Acceptance should leave the customer able to locate a measurement, review an alert and maintain the equipment through normal site work.

Price the installation and the ongoing review service

The initial quotation should separate the asset survey, equipment, mounting, access work, power and communications, platform mapping and commissioning. Include specialist review where the scope requires it. Record the mine-supplied information and site services needed for each stage, particularly shutdown windows and the personnel who approve installation and operating definitions.

Continuing costs can include instrument and battery maintenance, connectivity, platform operation, review support and site visits. State which activities the mine performs and which are included in the supplier agreement. Additional assets can reuse report conventions while still requiring their own point selection and approval. Evaluate the delivered value through actual reviewed events and maintenance records, with cost assumptions documented by the customer.

Prepare a first asset group for scoping

Send the critical-asset list, available fault and work-order history, spare-parts information and the proposed locations. Include area requirements, installation photographs and the maintenance window in which survey or fitting work could occur. Identify the engineering contact, operational owner and reviewer who will help define the first group's acceptance evidence.

The mining monitoring overview places reliability within the wider site requirement. The asset-monitoring service and mining maintenance guide explain the broader measurement and maintenance approach. For related processing-plant utilities and production interfaces, see the manufacturing overview.

Frequently asked questions

Method reference

PNNL's Operations and Maintenance Best Practices Guide, Release 3.0, including its maintenance-strategy and vibration-analysis sections, provides general method context. Checked 5 November 2026. The mine's asset information, equipment review and operating procedures determine the specific installation and maintenance decisions described in the project scope.