Mining Contract: Post-Accident AMS System
The objective is to develop a robust, intrinsically safe system that will incorporate atmospheric monitoring, two-way communications, and miner tracking, all in a single network.
Contract Status & Impact
This contract is complete. To receive a copy of the final report, send a request to OMSHR@cdc.gov.
An Atmospheric Monitoring System (AMS) depends on a functioning ventilation system to have fresh-air entries. When the mine fan stops, the mine has 15 minutes to either re-establish the fan or start evacuating all personnel. After 15 minutes, the mine is considered hazardous, and all underground AC mains power must be de-energized, which shuts off external power to the AMS. However, the internal batteries of the AMS remain in place, and these are not intrinsically safe. A paradox to the design of current Atmospheric Monitoring Systems is that at the time monitoring is needed most the system must be shut off.
This work developed and tested an intrinsically safe AMS that can stay operational post-event. The 30 CFR Part 23 compliant system uses power stations with only intrinsically safe outputs. All system components connected to the power stations are intrinsically safe. Using this approach, the mine fan no longer determines when the system is de-energized. In addition, the electrical cables connecting the systems components no longer need to be maintained in any specific location.
The developed system handles combinations of atmospheric monitoring (carbon monoxide, oxygen, methane), personnel tracking, and two-way communications. The incorporation of these components into a single network is critical to rescue efforts in that this approach allows all necessary system to remain operational simultaneously.
- Atmospheric Monitoring
- Continuous Monitoring of Airflow and Methane in Coal Mines
- Development and Application of Reservoir Models and Artificial Neural Networks for Optimizing Ventilation Air Requirements in Development Mining of Coal Seams
- Impact of Air Velocity on the Detection of Fires in Conveyor Belt Haulageways
- The Limiting Oxygen Concentration and Flammability Limits of Gases and Gas Mixtures
- Mine Communications and Tracking Glossary
- Mine Communications Engineering and Compatibility Guidelines
- Mining Communications and Tracking
- Modeling and Prediction of Ventilation Methane Emissions of U.S. Longwall Mines Using Supervised Artificial Neural Networks
- Through-The-Earth Wireless Real-Time Two-Way Voice Communications
- Page last reviewed: 3/24/2014
- Page last updated: 1/6/2014
- Content source: National Institute for Occupational Safety and Health, Mining Program