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  11. Study On Gas Explosion Propagation Law In Excavation Roadway With Tbm

Study on gas explosion propagation law in excavation roadway with TBM

Ao Liu1,2, Ke Gao3,4, Runzhi Li5

  • 1College of Safety Science and Engineering, Liaoning Technical University, No. 188, Longwan South Street, Huludao, 125105, Liaoning, China.

Scientific Reports
|October 27, 2024

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View abstract on PubMed

Summary
This summary is machine-generated.

Tunnel Boring Machines (TBMs) significantly increase gas explosion hazards in mines by doubling overpressure and flame speed. Methane concentration and accumulation length further intensify these risks, especially near TBM baffles.

Area of Science:

  • Mining Engineering
  • Explosion Safety
  • Computational Fluid Dynamics

Background:

  • Gas explosions are a major mining hazard, with excavation faces being common sites.
  • Understanding explosion dynamics in roadways is crucial for mine safety.

Purpose of the Study:

  • To investigate the impact of Tunnel Boring Machines (TBMs) on gas explosion propagation in mine roadways.
  • To analyze the influence of methane concentration and gas accumulation length on explosion parameters.

Main Methods:

  • Simulation analysis of explosion overpressure, pressure rise rate, and flame propagation speed.
  • Modeling the presence and effects of a TBM within the roadway.

Main Results:

  • TBM presence approximately doubles explosion overpressure and significantly increases flame propagation speed.
Keywords:
Explosion overpressureFlame propagation speedFlame temperatureGas explosion

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  • Peak flame propagation speed increase (approx. 6x) occurs at 9.5% methane concentration when passing TBM baffles.
  • Increased gas accumulation length leads to higher explosion overpressure and flame propagation speed.

    • Conclusions:

    • TBMs are a critical, often overlooked factor in mine roadway gas explosion dynamics.
    • Methane concentration and accumulation length are key variables influencing explosion severity.
    • TBMs affect both flame propagation and methane dissipation within mine excavations.
    Methane concentration
    Tunnel Boring Machine