Scholarlink

<p>This study focuses on a super-long inclined shaft construction tunnel in Ningbo. Field monitoring was conducted to analyze the variations of CO concentration, temperature, humidity, and airflow velocity under both secondary lining and blasting operations. A CFD-based numerical model was then developed to reproduce the ventilation characteristics during blasting, and the simulation results showed good agreement with the measured data. On this basis, the migration of CO and the airflow distribution were further investigated by optimizing the exhaust outlet layout, exhaust volume, and jet fan arrangement within the inclined shaft, leading to a proposed optimized ventilation scheme for super-long inclined shaft construction tunnels. The results indicate that all environmental parameters during secondary lining operations satisfy regulatory requirements, whereas certain indicators, particularly CO concentration and relative humidity, exceed permissible limits during blasting. With the optimized ventilation scheme, pollutants in the blasting zone can be effectively controlled and guided through the inclined shaft, significantly reducing CO residue in the main tunnel, improving air quality in the construction area, and providing both theoretical support and practical reference for ventilation design in super-long inclined shaft tunnels.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Research on Environmental Response Characteristic of Super-Long Inclined Shaft Tunnel and CO Diffusion and Ventilation Optimization of Blasting Procedures

  • 期刊论文

  • 发表日期：

    2025年11月3日

查看全文
  • Kong-fei Yu,
  • Huai-bing Wang,
  • Hong-yan Wang,
  • Chen-qi Fan,
  • Bu-rui Liu,
  • Xuan-ke Ren

摘要

This study focuses on a super-long inclined shaft construction tunnel in Ningbo. Field monitoring was conducted to analyze the variations of CO concentration, temperature, humidity, and airflow velocity under both secondary lining and blasting operations. A CFD-based numerical model was then developed to reproduce the ventilation characteristics during blasting, and the simulation results showed good agreement with the measured data. On this basis, the migration of CO and the airflow distribution were further investigated by optimizing the exhaust outlet layout, exhaust volume, and jet fan arrangement within the inclined shaft, leading to a proposed optimized ventilation scheme for super-long inclined shaft construction tunnels. The results indicate that all environmental parameters during secondary lining operations satisfy regulatory requirements, whereas certain indicators, particularly CO concentration and relative humidity, exceed permissible limits during blasting. With the optimized ventilation scheme, pollutants in the blasting zone can be effectively controlled and guided through the inclined shaft, significantly reducing CO residue in the main tunnel, improving air quality in the construction area, and providing both theoretical support and practical reference for ventilation design in super-long inclined shaft tunnels.