What it does
The Mines Work Health and Safety (Supplementary Requirements) Regulations 2025 (the Regulations) set out mine-specific obligations that supplement the Work Health and Safety Act 2012 and the Work Health and Safety Regulations 2022. The Regulations commence on 30 June 2025 (regulation 2) and expire on 30 June 2027 (regulation 45). They impose a structured compliance regime that centres on four operational pillars: systematic risk assessment and record-keeping (Parts 2 and 9); mandatory written plans for principal and identified risks (Part 3 and reg 6); a prescribed health and safety management system with named sub-programs (Part 4); and detailed technical and operational controls for ground control, atmosphere and ventilation, explosion/fire risk, roads, stockpiling and plant, shafts and winding, and mine closure (Parts 5 to 9). The Regulations repeatedly place primary responsibility on the mine operator to implement, document, review and make available the required risk assessments, plans, programs and records. For example, the mine operator must ensure a risk assessment is undertaken before start-up, when introducing plant or substances, when work changes, or when new hazards are identified (regulation 4(1)), and must keep written records of assessments and revisions for at least 7 years (regulation 5(1), (4)).
Regulatory oversight and discretion rest principally with the Chief Inspector of Mines and inspectors. The Chief Inspector may certify equivalent qualifications (regulation 40), determine alternative ventilation rates for diesel units (regulation 24(7)), and direct verification of mine plans (regulation 30(5)). Inspectors may direct a mine operator to prepare a major hazard management plan where a principal hazard is suspected (regulation 12). The Regulations also set specific testing, monitoring and documentation obligations: emergency plans must contain an emergency response plan and be tested and reviewed at least annually (regulation 15(2), (6)); underground ventilation and diesel-exhaust dilution must meet numerical requirements, including per-kilowatt air flow rates and ppm thresholds (regulation 24(3) to (6)); airborne dust concentrations are capped at specified time-weighted averages unless a more stringent Safe Work Australia exposure standard applies (regulation 21(3)); and seismicity must be monitored and documented with trigger points and ground support engineering (regulation 19).