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Emission-Assisted Maintenance for Advanced Diesel Engines and Exhaust Aftertreatment Systems in Underground Mining.

Mining, metallurgy & exploration·2025
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Advanced Diesel Powertrains for Underground Mining Mobile Equipment.

Aleksandar D Bugarski1, Dylan A Ritter1

  • 1Pittsburgh Mining Research Division, National Institute for Occupational Safety and Health, 626 Cochrans Mill Rd., Pittsburgh, PA 15236, USA.

Mining, Metallurgy & Exploration
|June 16, 2025
PubMed
Summary
This summary is machine-generated.

Repowering underground mining equipment with clean diesel engines significantly reduces diesel pollutant exposure. Diesel particulate filters (DPF) offer the best reduction in both mass and number concentrations of diesel aerosols.

Keywords:
Diesel aerosol emissionsDiesel enginesDiesel gaseous emissionsExhaust aftertreatment technologiesNitrogen dioxideUnderground mining

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Area of Science:

  • Mining Engineering
  • Environmental Science
  • Mechanical Engineering

Background:

  • Underground miners face significant exposure to harmful diesel pollutants.
  • Contemporary diesel engines offer reduced emissions compared to older models.
  • Meeting stringent emissions standards is crucial for underground mining safety.

Purpose of the Study:

  • To assess the viability and effectiveness of clean diesel engines for underground mining.
  • To evaluate different exhaust aftertreatment systems for reducing diesel emissions.
  • To identify optimal engine technologies for minimizing miner exposure to diesel pollutants.

Main Methods:

  • Laboratory characterization of tailpipe emissions from three U.S. EPA Tier 4 final compliant diesel engines.
  • Evaluation of exhaust aftertreatment systems including diesel oxidation catalytic converters (DOC), diesel particulate filters (DPF), and selective catalytic reduction (SCR) systems.
  • Analysis of engine performance regarding mass and number concentrations of diesel aerosols and secondary NO2 emissions.

Main Results:

  • Diesel particulate filters (DPF) demonstrated the highest reduction in both mass and number concentrations of diesel aerosols.
  • Engines with DOC and DOC/SCR/ASC systems reduced aerosol mass but not number concentrations.
  • Two engines (DOC-only and DOC/DPF) produced substantial secondary NO2 emissions, limiting their underground mining suitability.
  • All evaluated advanced engines exhibited low carbon monoxide (CO) output.

Conclusions:

  • Diesel particulate filters (DPF) are the most effective technology for reducing diesel aerosol exposure in underground mines.
  • Engine aftertreatment systems must be formulated to minimize secondary NO2 generation for underground applications.
  • Engines with selective catalytic reduction (SCR) systems offer a low-NO2 alternative.
  • Careful selection and potential optimization of advanced diesel engines are necessary for underground mining.