Hard Rock Chambers

For more than 20 years, Strata Worldwide has been developing innovative safety solutions for underground mines all over the world. Emergency Refuge Chambers are suitable for mine and underground constructions; they feature the latest innovation and technology, providing a safe shelter and quality breathing air in the case of an emergency. Strata Safety offers standard and custom built chambers to suit any type of underground mining application or underground construction. 100% compliance with the WA Guidelines.
Hard Rock Refuge Chamber & Scrubber
Primary and Backup Operation

Strata Refuge Chambers are designed to attach to the mine’s main compressor air lines and electrical power sources for an indefinite supply of breathable air and power. The mine air passes through a specialised filtration system to perform a complete cleansing by removing any taste or odours and preventing CO2 and heat build-up. The entrance of air creates a positive pressure throughout the chamber and a non-return valve controls the pressure. Power attaches to operate the lights, siren, carbon dioxide scrubber, optional air conditioner and optional atmospheric monitoring system. Strata Refuge Chambers are equipped with a standard 48 hours of battery and air back-up supplies. These systems are upgradeable to 96 hrs. Backup power is a bank of fully automatic 24-volt batteries at the rear of the chamber and backup air is provided by on-board oxygen cylinders and an active sodalime carbon dioxide scrubber.

Hard Rock Refuge Chamber Interior
Technical Advancements & Customisation

Technical Advancements

Technical advancements of the Strata Emergency Refuge Chambers include:

  • Robust Construction - Engineered and constructed to customer specifications.
  • Quality Air Supply System - High quality air filtration system purifies mine air. Backup air supply provides at least 48 hours of breathable air.
  • CO2 Scrubber System - Active CO2 Scrubber removes carbon dioxide using soda lime chemicals.
  • CO Removal - Battery powered catalytic CO Converter
  • Air Conditioning - DC Split Level air conditioner.
  • Standard & Custom Sizes - Strata Refuge Chambers are available in standard & custom sizes to meet individual customer needs. This includes custom length and heights of the structure.
  • Air-Tight Rugged Design - Withstand harsh environments and provides immediate breathable air upon entry.
  • AirLock Entry - Sectioned off area to help minimize the entrance of air contaminants into the main chamber. Optional purge air system can be used to flush the air in the airlock prior to occupants' entrance into the chamber
  • 24-Volt Lighting - Internal 24V LED lighting system.
  • Drinking Water & Food - Includes food & drinking water in storage compartments under the seats..
  • Easy Handling - Built-in fork lift guides, lifting facility and skid base assist with moving & relocating the refuge chamber.
  • Lavatory-Chemical toilet and supplies in a private compartment.
  • Cushioned Seating & Storage Areas - Cushioned seating for all occupants & storage areas for additional supplies/equipment.
  • Fire Extinguisher - 20 lb/9 kg fire extinguisher
  • Escape Hatch - Built-in emergency escape hatch.
  • External Location Lights - External location lights & warning siren.



The dimensions of the Strata Refuge Chambers can be customised according to specific customer requirements. A few examples include:

  • Tunneling (reduced width)
  • Low Profile mines (reduced height)
  • Powerless (air-powered and MSHA-approved components)
  • Compact and mobile (small, lightweight, and equipped with wheels)
Atmospheric and Chamber Monitoring

Continuously monitor the chamber’s internal and external atmospheric conditions.

  • Gas Monitoring: (O2, CO2, CO, H2S)
  • Battery Voltage Indicator
  • Battery Temperature indicator
  • Temperature inside & outside the chamber
  • Door “OPEN” Sensor (optional)
  • Remotely Turn Emergency Chamber Lights on during emergency
  • Remotely Turn Emergency Siren on during emergency

IP Fiber Camera
Remotely monitor the inside of refuge chamber in real time. Data transmitted via mine’s fiber network and relayed to the surface.

Long Life Emergency Water

Strata Long Life Water is made in Australia specifically for mining applications. It provides an alternative to normal water which has a limited shelf life.

Natural Australian spring water with added nutrients and formulated to increase the longevity.  With a shelf life of three years plus, Long Life water has a scientifically balanced mineral content and 7.9ph alkaline for health and well-being in an emergency.

Supplied in 600ml packs with a convenient screw cap, Long Life water is easy to store and use.

Download Long Life Emergency Water and Long Life Food brochure

Long Life Food

Emergency food rations designed for use in mine refuge chambers are portion controlled to provide the daily minimum nutrition while conserving natural body fluids. One bar is one meal replacement of 2000 calories. Long Life food is heat sealed in a vapour proof flexible pouch that can be opened by hand.

Packaged in 14 oz (396 gram) packaging with a 6 year storage life.

Download Long Life Emergency Water and Long Life Food brochure