Longwall Mining Operations SWMS
Underground coal longwall mining — shearer operation, roof-support advance, chock bleeding, methane gas monitoring, coal dust explosion management, shield interaction with strata, face conveyor operations, emergency egress and self-rescuer protocols.
SWMS variants reference your state’s WHS legislation. Instant download after payment.
Longwall mining operations involve the coordinated movement of a shearer, hydraulic roof supports (chocks/shields) and an armoured face conveyor (AFC) across a coal face up to 400 metres wide, in a continuously deforming strata envelope filled with explosive methane-air mixtures and respirable coal dust. The task is classified as High Risk Construction Work and High Risk Mining Work under WHS Regulation 2025 (concurrent with the NSW Coal Mine Health and Safety Act 2002 / Work Health and Safety (Mines and Petroleum Sites) Regulation 2014, the Qld Coal Mining Safety and Health Act 1999, and the WA Mines Safety and Inspection Regulations). A documented Safe Work Method Statement is mandatory before face entry because the work combines underground operation, powered mobile plant in a confined envelope, potentially explosive atmospheres and the proximity of workers to live hydraulic and electrical plant. This SWMS satisfies the PCBU's duty under WHS Reg s299–s300 to prepare, consult on and keep available a SWMS for each HRCW activity prior to commencement.
Hazards identified
7 hazards covered, sorted by priority.
Frictional ignition causing face explosion, fatal burns, blast trauma and statutory mine evacuation and inspectorate investigation
Secondary dust explosion propagation through gateroads causing multiple fatalities and accelerated coal workers' pneumoconiosis
Crushing fatality, entrapment behind goaf line and statutory loss of face control requiring section 195 directive
Crush, amputation or degloving injury from 800-tonne hydraulic closure or chain-drive entanglement, often fatal
Carbon monoxide poisoning, panel sealing and loss, and potential ignition of residual methane in the worked-out area
Drowning, sudden methane outburst, displacement of breathable atmosphere and disabling of statutory ventilation circuit
Asphyxiation during egress, exceeding the 60-minute oxygen budget and inability to reach the nearest refuge chamber
Control measures
Hierarchy-of-controls order: elimination → substitution → isolation → engineering → administrative → PPE.
- 1Elimination — Remove personnel from the face during shearer cutting passes by operating the shearer in automated horizon control (LASC) mode from the maingate monitoring station wherever the seam profile permits.
- 2Elimination — Prohibit hot work, smoking materials and non-Group I electrical equipment within the return airway and 100 m of the face at all times under the Trigger Action Response Plan.
- 3Substitution — Replace mineral-oil hydraulic fluids in chock rams with HFA-E or HFC fire-resistant fluids compliant with AS 1180.8 to reduce ignition risk from high-pressure pinhole leaks.
- 4Substitution — Use water-mist venturi sprays on the shearer drums in place of dry cutting to suppress frictional ignition and respirable dust at the point of generation.
- 5Engineering — Maintain continuous tube-bundle and real-time telemetric gas monitoring for CH4, CO, O2 and CO2 with automatic shearer trip at 1.25% CH4 in accordance with AS/NZS 60079.29.
- 6Engineering — Install and weekly-test stone-dust barriers and passive water troughs in gateroads at spacings calculated under the Coal Mines (Underground) Regulation explosion-suppression schedule.
- 7Engineering — Interlock shield lower, AFC start and shearer haulage through the face control system so no function can energise without positive operator presence detection and audible pre-start warning.
- 8Administrative — Conduct documented pre-shift TARP review, gas reading verification and SWMS sign-on at the deployment point; rotate shearer operators every 4 hours to manage fatigue and dust exposure.
- 9Administrative — Maintain a current Principal Hazard Management Plan for methane, dust, strata and spontaneous combustion, cross-referenced to this SWMS and the mine's Emergency Response Plan.
- 10PPE — Issue and verify donning of self-contained self-rescuers (min 60 min O2), cap lamp with CO sensor, AS/NZS 1801 hard hat, AS/NZS 1337.1 impact eyewear, AS/NZS 1715 P2 respirator and AS/NZS 2210.3 mining boots before deployment.
Applicable Codes of Practice
Mandates documented PHMPs for methane, strata, spontaneous combustion and inrush, which this SWMS operationalises at task level for each longwall shift.
Specifies interlock integrity and emergency stop performance for shearer, AFC and shield control systems referenced in the engineering controls above.
Sets calibration, alarm threshold and trip performance for fixed and personal methane monitors required at the shearer, return and tailgate locations.
Defines statutory gas action levels, ventilation quantities and incombustible content limits that drive the TARP triggers embedded in this SWMS.
High-Risk Construction Work triggered
Longwall extraction occurs 200–500 m below surface in a continuously advancing underground excavation with active strata convergence and limited egress paths.
Goaf bleed inspections, AFC tail-drive access and shield interspace work occur in restricted-atmosphere envelopes meeting AS 2865 confined space criteria.
Operators work within metres of a moving shearer, traversing shields and an energised armoured face conveyor — all classified as powered mobile plant.
PCBU must prepare, consult workers on and retain this SWMS for the life of the panel plus statutory record period; failures attract Category 1 or 2 offences with penalties that are substantial and indexed — current maximum follows the prevailing WHS schedule.
Who this is for
- →Underground production managers at coal mining operations
- →Longwall shearer operators and chock fitters
- →Mine deputies and ventilation officers underground
- →Statutory site senior executives and OCEs
What you receive
- ✓Editable DOCX template — Microsoft Word compatible
- ✓State-specific WHS legislation schedule (NSW/VIC/QLD/SA/WA/TAS/NT/ACT)
- ✓Hazard register with risk ratings + hierarchy-of-control mapping
- ✓Worker sign-on register, pre-start checklist, and incident escalation flow
Worked example
At a Bowen Basin underground coal operation, the afternoon shift deputy convenes the pre-start brief at the maingate crib room before deploying ten workers to advance LW301 by 24 web cuts. The deputy opens this SWMS on the tablet and walks the crew through the hazard register, pausing on methane layering and shield-envelope crush risks because the previous shift logged a 0.9% CH4 spike at the tailgate. Using the controls matrix, the team confirms the LASC automation mode is available for cuts 6–18, the water-mist sprays were pressure-tested at handover, and the stone-dust barriers were replenished at chainage 1840. Each worker reviews the self-rescuer donning sequence and signs on electronically against the SWMS, with the new graduate fitter receiving a verified buddy-pairing entry. Two hours into the shift, the tube-bundle returns 1.1% CH4 at the shearer — below the 1.25% trip but above the TARP Level 2 trigger embedded in this SWMS. The deputy halts cutting, increases auxiliary ventilation quantity, and the SWMS is re-opened on the face tablet to record the deviation, the dynamic risk reassessment and the supervisor's authorisation to resume. The amended document is uploaded to the mine record system before end of shift, satisfying the consultation, monitoring and record-keeping duties under WHS Reg s300 and the state mining regulation.
Related legislation
- WHS Act 2011 (model)
- WHS Regulation 2025
- AS 2865 — Confined spaces
Frequently asked questions
Is longwall mining high risk construction work?
No, and getting the regime right matters because the wrong one means the wrong duties. Underground coal extraction is mining work rather than construction work, so the s291 categories and the s299 SWMS duty are not the governing obligation here. What governs is your state's mining safety legislation — in NSW the Work Health and Safety (Mines and Petroleum Sites) Regulation 2014, in Queensland the Coal Mining Safety and Health Act 1999 with its 2017 Regulation, and the equivalent Western Australian provisions. Those require Principal Hazard Management Plans for methane, strata, dust, spontaneous combustion and inrush. This document operationalises those plans at task level for each shift.
How does this connect to the mine's TARP and Principal Hazard Management Plans?
It sits underneath them as the shift-level document. The Principal Hazard Management Plans set the mine-wide strategy for methane, dust, strata and spontaneous combustion; the Trigger Action Response Plan sets the numbers that force a decision; and this is where the crew reviews both at the deployment point and signs on. The worked example shows the seam clearly — the tube bundle returns 1.1% methane at the shearer, below the 1.25% automatic trip but above a TARP Level 2 trigger, so cutting halts and auxiliary ventilation increases before anyone resumes. Cross-referencing to the current plans and the Emergency Response Plan is an explicit administrative control.
What stops a shield lowering while someone is inside the envelope?
Positive operator presence detection, interlocked through the face control system. Shield lower, armoured face conveyor start and shearer haulage are interlocked so no function can energise without presence detection and an audible pre-start warning, built to AS/NZS 4024.1601 for interlock integrity and emergency stop performance. The reason is the closure force — an 800-tonne hydraulic shield offers no second chance, and chain-drive entanglement on the conveyor is the other mechanism in the register. Above the interlock sits the elimination control: running the shearer in automated horizon control from the maingate station removes people from the face during cutting passes entirely.
How is frictional ignition at the shearer drum controlled?
At the drum and in the atmosphere simultaneously. Water-mist venturi sprays on the drums replace dry cutting, suppressing frictional ignition and respirable dust at the point of generation. Continuous tube-bundle and real-time telemetric monitoring covers methane, carbon monoxide, oxygen and carbon dioxide with an automatic shearer trip at 1.25% methane per AS/NZS 60079.29. Ignition sources are excluded outright — no hot work, smoking materials or non-Group I electrical equipment in the return airway or within 100 m of the face. Fire-resistant HFA-E or HFC hydraulic fluids to AS 1180.8 replace mineral oil so a high-pressure pinhole leak cannot itself become the ignition source.
What do I receive, and how does it sit with our existing mine documentation?
A single editable Word document, bought once, with the hazard register and risk ratings shown here, hierarchy-of-control mapping, a state-specific WHS legislation schedule, a worker sign-on register, a pre-start checklist and an incident escalation flow. It supplements your statutory mine documentation rather than replacing any of it — the Principal Hazard Management Plans, ventilation plan and Emergency Response Plan remain the controlling documents. Before use, add the panel and face details, your current TARP trigger levels and action steps, gas monitoring points and calibration records, self-rescuer and refuge chamber locations, and the statutory positions authorising each stage.