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Comparison of variability in attainable travel distance with work rate between 2 Types of SCSR - FY08


  • Previous research has shown performance variability between 4 models of SCSR, furthermore with body weight (Turner, et al., 2002). Others have indicated that the usable oxygen supply by a chemical oxygen SCSR is variable at high work rates, which would produce a wide variation of travel distance during an escape (Johnson, et al., 2007)
  • This investigation would measure the distance traveled while using the proposed variable work rate (CCER Concept Paper) in order to evaluate whether use rate affects the quantity of usable oxygen in two different types of SCSR

Applicable Standards

  • 42 CFR Part 84, Subpart O
  • MINER Act

Key Partners

  • MSHA


  • Global mining industry
  • Respirator manufacturers
Man on treadmill wearing (S C S R)

Project Scope

  • While breathing from an SCSR, subjects (5 miners) would exercise on a treadmill at 3 levels of energy expenditure (0.5, 2, and 3 L/min.) until fatigued, oxygen supply is exhausted, FIO2 < 19.5%, or FICO2 > 4%
  • SCSR would include chemical oxygen (Draeger OXY-K Plus and CSE SR100) and compressed oxygen (Ocenco EBA 6.5 and Ocenco M20)
  • Results would determine whether higher use rate reduces the quantity of usable oxygen


  • Q2 Procure SCSR
  • Q3 -Q4 Begin draft for experimental design and protocol


  • Manuscripts submitted to peer-reviewed journals
  • Presentations at national/international conferences
  • NIOSH guidance for SCSR manufacturers


  • Data from project are used to revise or support existing NIOSH guidance for SCSR breathing resistance and oxygen delivery systems
  • Recommendations from project for improved SCSR management during an escape used by NIOSH and/or MSHA to support resolutions or guidance
Page last updated: August 08, 2008
Page last reviewed: August 08, 2008
Content Source: National Institute for Occupational Safety and Health (NIOSH)