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DPM flow pattern of LHD in underground mines with different ventilation conditions

Journal Article


Abstract


  • Diesel-operated Load Haul Dumper (LHD) vehicles are commonly used in underground

    coal mines. Despite their value as utility vehicles, the main drawback of these vehicles is

    that they generate diesel particulate matter (DPM), a known carcinogenic agent. In this

    work, an attempt is made to model DPM flows generated by LHDs in an underground

    coal mine environment for different DPM flow and intake air flow directions. The field

    experiments are conducted and used to validate the computational fluid dynamics (CFD)

    models and used to map the DPM flow patterns. The results obtained show that if DPM

    and the intake air co-flow (flow in the same direction), DPM is confined predominantly

    in the middle of the roadway. To the contrary, if the DPM and intake air counter-flow

    (flow in the opposite directions), the DPM spread occurs throughout the entire

    cross-section of the roadway. In the latter case, the operator will be more susceptible to

    exposure to high concentrations of DPM. Overall, the DPM concentration decreases

    with an increase in the intake air velocities. For co-flow for intake air velocities of 2 m/s,

    3 m/s, and 4 m/s, the DPM concentrations at 50 m downstream of the vehicles are 39

    μg/m3, 23 μg/m3, and 19 μg/ m3, respectively. The DPM concentration is also influenced

    by the DPM temperature at the source. For the DPM temperatures of 30 oC, 40 oC, 50

    oC, and 60 oC, the DPM concentrations at 50 m downstream of the source are 43 μg/m3,

    34 μg/m3, 12 μg/m3, and 9 μg/m3, respectively.

Publication Date


  • 2019

Citation


  • Morla, R., Karekal, S. & Godbole, A. (2019). DPM flow pattern of LHD in underground mines with different ventilation conditions. Journal of Mining and Environment, 10 (2), 315-326.

Number Of Pages


  • 11

Start Page


  • 315

End Page


  • 326

Volume


  • 10

Issue


  • 2

Place Of Publication


  • Iran

Abstract


  • Diesel-operated Load Haul Dumper (LHD) vehicles are commonly used in underground

    coal mines. Despite their value as utility vehicles, the main drawback of these vehicles is

    that they generate diesel particulate matter (DPM), a known carcinogenic agent. In this

    work, an attempt is made to model DPM flows generated by LHDs in an underground

    coal mine environment for different DPM flow and intake air flow directions. The field

    experiments are conducted and used to validate the computational fluid dynamics (CFD)

    models and used to map the DPM flow patterns. The results obtained show that if DPM

    and the intake air co-flow (flow in the same direction), DPM is confined predominantly

    in the middle of the roadway. To the contrary, if the DPM and intake air counter-flow

    (flow in the opposite directions), the DPM spread occurs throughout the entire

    cross-section of the roadway. In the latter case, the operator will be more susceptible to

    exposure to high concentrations of DPM. Overall, the DPM concentration decreases

    with an increase in the intake air velocities. For co-flow for intake air velocities of 2 m/s,

    3 m/s, and 4 m/s, the DPM concentrations at 50 m downstream of the vehicles are 39

    μg/m3, 23 μg/m3, and 19 μg/ m3, respectively. The DPM concentration is also influenced

    by the DPM temperature at the source. For the DPM temperatures of 30 oC, 40 oC, 50

    oC, and 60 oC, the DPM concentrations at 50 m downstream of the source are 43 μg/m3,

    34 μg/m3, 12 μg/m3, and 9 μg/m3, respectively.

Publication Date


  • 2019

Citation


  • Morla, R., Karekal, S. & Godbole, A. (2019). DPM flow pattern of LHD in underground mines with different ventilation conditions. Journal of Mining and Environment, 10 (2), 315-326.

Number Of Pages


  • 11

Start Page


  • 315

End Page


  • 326

Volume


  • 10

Issue


  • 2

Place Of Publication


  • Iran