Detection is Better than Cure

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Every incident on a mine can shut down operations. The right systems provide both early detection of problems and quick interventions to prevent and contain incidents of fire and fumes. If a safety system can’t be available, temporary pumps and suppression systems will keep workers safe and the site running.

“Detection is better than cure, especially in mines where you have a tinderbox of different flammable materials. It’s not just about fire suppression. Fumes from a fire are more likely to overwhelm miners than the flames. If you can detect these early and respond to them automatically, you cause much less business disruption,” says Chetan Mistry, Marketing and Strategy Manager for Xylem Africa.

Mining companies can gain a lot more value from fire suppression and ventilation systems if they consider a few key concerns:

  • Routinely exercise the pumps, ensuring they operate as required. Maintain a regular testing schedule and don’t only rely on vendor inspections.
  • Efficient ventilation is crucial, especially for detecting vapours before they become a problem. Understanding air velocity will help operators stay ahead of any fire, and ventilation-on-demand systems can direct air where needed, thus not wasting power and ventilation on unoccupied parts of the mine.
  • Understand the volume of water required by the system, based on the likely fire environment it has to suppress. A single sprinkler can easily use 50 litres of water in a minute. Consider what is required to meet any fire risks and also keep in mind the impact of flooding.
  • Canisters and piping containing suppression agents can be monitored in real-time to report on their status and levels. This can cut down substantially on the costs of inspections.
  • Likewise, it’s very important to know the state of pressure in the fire suppression system. Pressure should always be maintained in case of a fire event. Low pressure can result from undiscovered leaks. Too much pressure is not good either, as the system could go off randomly or be damaged when discharging water. Use sensing and controller equipment to monitor and maintain steady pressure.
  • Locate fire pumps rooms for easy access during fire demand situations. Though it may be tempting to incorporate a pump room into the facility as much as possible, consider how a fire could impede access to it, then look at a new location or measures to keep access available during an emergency, such as mobile fire extinguishers around the room.
  • Ventilation curtains can isolate and control the flow of vapour in different parts of the mine. A real-time monitoring system automatically detects and reroutes vapours away from occupied areas.
  • One suppression system does not fit all scenarios and can raise expenses with much less impact. Mines should use a blend of water-based and liquefied gaseous systems. The respective systems have pros and cons – sprinklers might leak, and liquified gas operates under high compression. But when used in the proper context, they are both affordable and highly effective.
  • Pumps are important. A well-designed pump system will rely on the right amount and choice of pump units and ensure that water reaches all areas of the mine. There are terrific options for both permanent and temporary fire-prevention pumping systems. Just buying pumps until a system can operate is inefficient and likely to cost much more in the long run.
  • Turnkey fire suppression systems are very robust and cover all the needs of modern mines, including certified components and prefabricated skid/house packages. By using these components and the design expertise of a qualified partner, fire suppression systems become very affordable and still exceed performance and value expectations.

“We take mining safety very seriously. We blend our knowledge around mining with innovative safety products and market-leading pumping systems. Even though every mine is unique, we can scale our experience to bring affordable systems into any environment, reduce risk, and raise the value of health & safety investments.

“South Africa’s excellent mine safety record is an example for the rest of the world. Closing the gap, and keeping it closed, will require a balance between cost-effectiveness and safety excellence. With our support, customers can reach that stage and keep their workers safe while maintaining healthy margins,” Chetan concludes.
www.xylem.com