Mining Project: Improving Situational Awareness through Visual Interventions

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Principal Investigator
Start Date 11/7/2014
End Date 9/30/2019
Objective

To reduce the risk of fatalities and serious injuries by using human visual performance data to develop specifications for visual cues and technologies that will yield improved situational awareness and decisionmaking during self-escape and while operating roof bolter machines.

Topic Areas

Research Summary

The authors of the 2013 report, "Improving Self-Escape from Underground Coal Mines," identified the need to empower miners to self-escape during a mine emergency. The report put forth numerous recommendations, including the need to accelerate wayfinding technology efforts that enhance situational awareness and self-escape. Currently, self-escape technologies include signage for marking escapeways and lifelines, but these technologies have major limitations as currently applied in mining. Lifeline technology consists of a rope with directional cones that is not visible during smoke-filled mine conditions, so there is a need to improve lifeline visibility. Lastly, the need to enhance situational awareness extends to non-emergency situations involving the hazards associated with roof bolting machines.

To address these needs, this project had three research aims, as follows:

  1. Escapeway markers and signage—Conduct human subjects testing to determine the specifications for visual cues to aid in self-escape based on detection and recognition of the visual cue, quality of the decision made based on interpreting the visual cue, and other key parameters associated with visual acuity.
  2. Lighted lifeline—Conduct a proof-of-concept study on the feasibility of using a light-diffusing optical fiber-based lifeline to provide a visual cue and additional information to self-escaping mine workers as a means for improving situational awareness and decision making.
  3. Roof bolter illumination system—Conduct human subjects testing to determine the required lighting intensity and distribution of an illumination system to improve a miner’s visual performance with respect to hazard detection and glare reduction for the internal working areas of a roof bolting machine.

Research under this project had a human-centered approach to empower miners with visual information that improved situational awareness and decisionmaking. A proof-of-concept study and human subjects testing was used to better understand the visual needs of mine workers and determine the best illumination for various systems used in underground mines.

Results from this research helped the mining industry in two distinct ways—by enhancing self-escape and by reducing traumatic injuries involving mining equipment.

Related Resources

Underground Coal, Metal, and Nonmetal Mine Illumination Systems for Improving Miner Visual Performance (foundational project research)

NIOSH Saturn Area Light (improved roof bolter lighting based on NIOSH research)

NIOSH Jupiter II Wide Area Light (improved area lighting based on NIOSH research)

The Human Factors of Mineworker Fatigue: Unique Properties of Fatigue in the Mining Environment (forum topic discussion)

Related Publications

LED Area Lighting to Reduce Glare for Roof Bolter Operators

Effects of Light Spectrum on Luminance Measurements in Underground Coal Mines

LED Lighting for Improving Trip Object Detection for a Walk-thru Roof Bolter

Light Source Spectral Power Effect on Luminance Measurements in Underground Coal Mines

Luminance Measurement for Underground Mine Lighting

Technology News 560 - The Saturn LED Area Light Provides Improved Illumination for Greater Roof Bolter Safety

LED Light Reduces Roof Bolter Lighting Glare

Page last reviewed: 3/10/2020 Page last updated: 3/10/2020