A survey of 290 tunneling industry workers in Australia has identified a critical gap between awareness of silica dust risks and the consistent implementation of safety controls.
Study Overview
Led by the University of Sydney and published in the Australian and New Zealand Journal of Public Health, the research was conducted from September 2024 to June 2025. It examined exposure levels, health outcomes, and workplace practices among industry professionals.
Key Findings
Health Impacts
- 14.2% of participants reported having a silica-related disease or condition.
- The most commonly reported conditions were chronic bronchitis, silicosis, and rheumatoid arthritis.
Exposure Levels
- Expert analysis indicated that conditions for most work groups exceeded workplace exposure limits for silica dust.
Barriers to Control
- 62.5% of respondents identified barriers to effective dust control, including time pressures, lack of management commitment, and weak regulatory enforcement.
Regulatory Perception
- Nearly half of respondents did not believe regulators were effective in promoting safe practices.
- Some reported that advance notice of inspections led to temporary modifications to appear compliant.
Monitoring and Trust
- While air monitoring was common, trust in the results was low.
- Respondents cited concerns about artificially altered conditions and a lack of data sharing.
Workplace Culture
Surveyed workers described environments where production was prioritized over safety and where raising concerns could risk job security. Some reported conditions so dusty that visibility was reduced to a few meters.
Background and Context
The study noted that dust control technologies have improved over the past decade. However, researchers stated that these measures may not be consistently applied, or may be relied upon instead of controlling hazards at the source.
"The issue is not a knowledge gap, but a failure of leadership, accountability, and enforcement."
— Lead researcher Kate Cole OAM, Faculty of Medicine and Health
The study calls for stronger regulatory enforcement and oversight, warning that without systemic change, preventable disease remains a risk as Australia's infrastructure pipeline expands.