Mining Topic: Refuge Chambers
What is the health and safety problem?
Over the years, several mine workers, such as those involved in the Sago mine explosion, have survived an initial disaster but later succumbed to toxic gases because they could not be rescued quickly enough. Since 2009, federal regulations require that refuge alternatives be installed in all U.S. underground coal mines. Refuges are intended to provide mine workers access to clean air, food, and water until they can be rescued. If mine workers understand when and how to properly use refuges, their chances of surviving disasters could be greatly improved.
What is the extent of the problem?
As part of a recent study funded by OMSHR, U.S. coal mining accidents since 1970 were reviewed to determine whether the availability of a refuge would have helped save mine workers’ lives. The review encompassed all ignitions, explosions, fires, and inundations where at least one mine worker was killed. The results indicate that refuge chambers would have had a positive impact on the outcome of 12 of 38 such events. The researchers conclude that, “a total of 74 of the 252 fatalities (29%) would have been positively impacted and potentially would have survived the accident.” About 40,000 mine workers work in U.S. underground coal mines. They all need effective training on the use of refuge chambers before the next mine disaster strikes.
How is the NIOSH Mining program addressing this problem?
The Mine Safety and Health Administration (MSHA) passed regulations in 2008 requiring that mine workers be given annual instruction on the deployment and use of refuge alternatives (see 30 CFR 75.1504(c)(3)). To help the coal industry comply with these regulations, and to help instructors teach mine workers about the use of refuge chambers, the Office of Mine Safety and Health Research (OMSHR) developed a suite of training modules covering:
- operations - how to operate a refuge chamber
- decision-making - what alternatives to consider when deciding whether to enter a refuge chamber
- expectations - what to expect physiologically and psychologically when seeking shelter in a refuge chamber
By completing this training, mine workers will be better prepared to make educated decisions during emergencies such as fires or explosions, and will better understand the purpose and use of refuges.
What are the significant findings?
OMSHR researchers developed, field tested, and published six refuge chamber training modules to address the training needs described above. They have also published two reports containing recommendations for (1) conducting effective refuge chamber operations training, and (2) creating effective manuals to teach mine workers how to set up, inspect, move, and maintain refuge chambers.
What are the next steps?
OMSHR is monitoring the industry and will continue to seek feedback from stakeholders on the need for future refuge chamber training research.
- Announcing Two New Sister Publications on Refuge Alternatives
- Coal Mining Disasters: 1839 to Present
- Emergency Escape & Refuge Alternatives
- Guidelines for Instructional Materials on Refuge Chamber Setup, Use, and Maintenance
- Harry’s Hard Choices: Mine Refuge Chamber Training
- How to Operate a Refuge Chamber: A Quick Start Guide
- Investigation of Enhanced Refuge Alternatives
- Investigation of Purging and Airlock Contamination of Mobile Refuge Alternatives
- Investigation of Temperature Rise in Mobile Refuge Alternatives
- Man Mountain’s Refuge: Refuge Chamber Training Instructor’s Guide and Trainee’s Problem Book
- Progress Toward Improved Engineering of Seals and Sealed Areas of Coal Mines
- Recommendations for Refuge Chamber Operations Training
- Reducing the Fire and Explosion Hazards of Flame-Cutting and Welding in Underground Coal Mines
- Refuge Alternatives in Underground Coal Mines
- Refuge Chamber Expectations Training - 1.0
- Rock Dusting Considerations in Underground Coal Mines
- Technology News 535 - NIOSH Releases New Educational Video: Escape from Farmington No. 9: An Oral History
- Technology News 537 - NIOSH Develops New Mine Refuge Chamber Training
- When Do You Take Refuge? Decisionmaking During Mine Emergency Escape
- Page last reviewed: 4/8/2014
- Page last updated: 9/22/2015
- Content source: National Institute for Occupational Safety and Health, Mining Program