The Occupational Health Burden of Australian Mining
Australian mining has the highest rate of noise-induced hearing loss workers’ compensation claims of any industry. It is responsible for the majority of coal workers’ pneumoconiosis (CWP) diagnoses in the country, and silicosis from metalliferous mining continues to affect hundreds of workers. Diesel particulate matter (DPM) — a Group 1 carcinogen — is ubiquitous in underground operations. Heat illness risk in deep underground and remote surface operations is acute. Yet the mining sector also has the most mature occupational hygiene programs of any Australian industry, driven by decades of regulatory pressure and the severity of consequences when controls fail.
Respirable Dust in Mining
Metalliferous mining (gold, copper, nickel, iron ore, zinc) generates silica-containing dust from drilling, blasting, and crushing of silica-bearing rock. Silicosis risk in Australian metalliferous miners — a well-documented dust and airborne contaminant hazard — has been known for a century but continues to be identified in regulatory health surveillance — triggering the mandatory health monitoring obligations under the WHS Regulations for workers exposed to lead and other scheduled hazardous chemicals. Dust suppression systems — water injection in drill holes, wet blast practices, water sprays on transfer points — are the primary engineering controls. Personal protective equipment (P2/P3 respirators) is a supplementary control for tasks where engineering measures cannot adequately reduce exposure. All mining workers using P2 or P3 respirators must be individually fit tested — see our detailed guide on mask fit testing compliance for Australian mining and resources workers.
Coal mining generates coal dust (pneumoconiosis risk) and, importantly, silica dust from the stone partings within coal seams and from roof and floor rock. The resurgence of CWP in Queensland and New South Wales from 2015 onwards prompted emergency regulatory responses including mandatory health surveillance programs, coal dust monitoring requirements, and use of continuous personal dust monitors (PDMs) to provide real-time feedback to underground operators.
Diesel Particulate Matter (DPM)
DPM is generated by all diesel-powered equipment and consists of fine carbonaceous particles (elemental carbon, organic carbon) with adsorbed polycyclic aromatic hydrocarbons (PAHs) and other compounds. It is classified as a Group 1 carcinogen (IARC) based on evidence from underground miners and other occupational cohorts. In poorly ventilated underground environments, DPM can accumulate to concentrations far exceeding safe limits. Controls include: ventilation design adequate to dilute DPM; use of diesel oxidation catalysts (DOCs) and diesel particulate filters (DPFs) on equipment; engine tier upgrades; and substitution of diesel equipment with electric alternatives where practicable.
Australia does not yet have a formal enforceable WES for DPM (elemental carbon is used as a surrogate in most monitoring programs). However, most major mining companies apply the NIOSH REL for EC of 0.02 mg/m³ as an internal guideline. The WES-to-WEL transition may introduce a formal DPM limit for the first time.
Noise in Mining
Mining equipment generates some of the highest noise levels of any industry: drilling rigs 100–120 dB(A); crushers and screens 95–110 dB(A); haul trucks (cab) 80–88 dB(A); blasting events (impulsive peaks) >140 dB(C). Noise-induced hearing loss is the most prevalent occupational disease in Australian mining. Hearing conservation programs in mining must include baseline audiometry before placement in noisy roles, annual audiometric surveillance, engineering noise controls (cab insulation, vibration isolation), administrative controls (limiting time in high-noise zones), and HPD management with fit-testing.
Heat Stress in Mining
Heat stress is a significant risk in deep underground mines (geothermal gradient increases temperature with depth, particularly in WA and QLD operations) and in surface mining in tropical and arid regions. Heat stress assessment uses the Wet Bulb Globe Temperature (WBGT) index, which accounts for temperature, radiant heat, humidity, and air movement. For a comprehensive breakdown of heat stress assessment standards and controls in Australian workplaces, including WBGT thresholds and acclimatisation protocols, see our full assessment guide. Controls include: refrigeration and ventilation systems in underground operations; work-rest regimens; acclimatisation programs for new workers; buddy systems and emergency response plans; and heat illness recognition training for all workers and supervisors.
← Dust & Airborne Contaminants | Noise & Hearing Conservation →
