Journal
ENVIRONMENTAL POLLUTION
Volume 270, Issue -, Pages -Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.envpol.2020.116264
Keywords
Shield carrier; Diffusion and distribution of DPM; Numerical simulation; DPM concentration; Ventilation rate
Categories
Funding
- National Natural Science Foundation of China [51874191, 51404147]
- National Key R&D Programof China [2017YFC0805201]
- Qingchuang Science and Technology Project of Shandong Province University [2020KJD002]
- Taishan Scholar Project Special Funding [TS20190935]
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The study aimed to investigate the diffusion of diesel particulate matter from a mine subsidiary transportation vehicle in tunnels and propose prevention measures. Increasing ventilation rate and limiting travel speed were found to effectively reduce DPM pollution in tunnels.
The aim of this study was to investigate thoroughly the diffusion and distribution of diesel particulate matter (DPM) discharged from a mine subsidiary transportation vehicle to improve the air quality in tunnels by reducing exhaust pollution and to propose targeted prevention measures. More specifically, the diffusion of DPM from a WC40Y shield carrier during its travel was examined in depth with numerical simulations. The results show that, under the current ventilation conditions, the airflow in the tunnel was insufficient for diluting the DPM discharged from the shield carrier during starting, accelerated traveling, and turning; this can be effectively addressed by increasing the ventilation rate to 1.8 m/s. However, during high-velocity travel, the carrier was affected by the piston wind could not be diluted effectively by increasing ventilation rate. The velocity limit can lower the DPM concentration in the tunnel and alleviate DPM pollution from the shield carrier. To reduce DPM emissions, the travel velocity should be limited to 30 km/h. Summary: Determine the optimal airflow velocity in the tunnel that ensures that the discharged DPM is effectively diluted during the travel of the shield carrier. (C) 2020 Elsevier Ltd. All rights reserved.
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