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Arabian Journal for Science and Engineering

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26.08.2020 | Research Article-Civil Engineering

Study on Airflow Migration and Rock Dust Pollution Behavior in TBM Construction Tunnel

verfasst von: Qiang Liu, Wen Nie, Yun Hua, Cunhou Wei, He Ma, Changqi Liu, Wenjie Zhou

Erschienen in: Arabian Journal for Science and Engineering | Ausgabe 10/2020

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Abstract

When tunnel boring machines (TBMs) are used to construct tunnels, large quantities of rock dust are produced, affecting the working environment of construction personnel. To explore ways to improve the air quality in tunnels, this study employed a numerical simulation to investigate controlling rock dust via tunnel ventilation systems. The results showed that when the secondary compressed airflow rate (Q₂) was set to 4–11 m³/s, the rock dust produced could be controlled within a range of 77.2 m from the tunnel face. When Q₂ = 8 m³/s, the rock dust diffusion distance (L_D) reached a minimum of 42.7 m, and the rock dust concentration around the operating region (C_W) was approximately 30.1 mg/m³. To explore the further enhancement of dust suppression performance in a tunnel, a numerical simulation was conducted on rock dust diffusion in the tunnel when Q₂ was fixed but the exhaust airflow rate (Q_C) was set to different values. According to the numerical simulation results, when Q_C = 15 m³/s, the rock dust produced could be effectively controlled at the front of the tunnel with a length of 14.6 m, i.e., the rock dust could be most effectively suppressed.

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Titel: Study on Airflow Migration and Rock Dust Pollution Behavior in TBM Construction Tunnel
verfasst von: Qiang Liu
Wen Nie
Yun Hua
Cunhou Wei
He Ma
Changqi Liu
Wenjie Zhou
Publikationsdatum: 26.08.2020
Verlag: Springer Berlin Heidelberg
Erschienen in: Arabian Journal for Science and Engineering / Ausgabe 10/2020
Print ISSN: 2193-567X
Elektronische ISSN: 2191-4281
DOI: https://doi.org/10.1007/s13369-020-04858-z

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