Analysis and comparison of airflow-respirable dust control and innovative ventilation environment in drilling construction tunnels
Analysis and comparison of airflow-respirable dust control and innovative ventilation environment in drilling construction tunnels
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DOI：
10.1016/j.apr.2023.101908
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发表时间：
2023-08
影响因子：
4.5
通讯作者：
Jinnan Guo;Angui Li;Ran Gao;Yicun Hou;Tianqi Wang;Jiaxing Li;Yifei Yin;Lunfei Che
中科院分区：
文献类型：
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作者：
Jinnan Guo;Angui Li;Ran Gao;Yicun Hou;Tianqi Wang;Jiaxing Li;Yifei Yin;Lunfei Che
采用钻爆法建设地下空间，粉尘污染严重。本文提出了一种改进且高效的附加通风系统。建立了1:1比例数值模拟模型，并通过现场试验进行了验证。研究结果表明，附着通风模式下司钻呼吸区粉尘浓度较传统强制通风降低6.4%~8.7%，且当风道长宽比小于1:20、风道距洞壁距离400~800 mm时，呼吸区粉尘浓度最多可降低27.3%。如果通风系统安装位置可以调整，则通风系统安装位置的首选位置可以是拱的底部、拱顶和拱部。当附属通风系统位于拱门底部时，四个人员呼吸区域的粉尘浓度分别为 54.9、58.9、56.1 和 76.1 mg/m3。因此，通过这种优化的通风系统，可以控制钻孔产生的粉尘，显着提高控尘性能。
Constructing underground spaces via drilling and blasting methods encounters severe dust pollution. In this paper, an improved and efficient attached ventilation system was presented. A 1:1 proportional numerical simulation model was established and validated by on-site tests. Research results showed that the dust concentration in the driller respiratory regions under the attached ventilation mode was 6.4%–8.7% lower than that under traditional forced ventilation, and when the aspect ratio of the duct was less than 1:20 and the distance from the duct to the tunnel wall ranged from 400 mm to 800 mm, the dust concentration in the respiratory region could be reduced by a maximum of 27.3%. If the ventilation system installation position could be adjusted, the preferred locations for the ventilation system installation position could be ordered as the bottom, vault, and haunch of the arch. The dust concentrations of the four personnel respiratory regions were 54.9, 58.9, 56.1, and 76.1 mg/m3, respectively, when the attached ventilation system was located at the bottom of the arch. Therefore, with this optimized ventilation system, the dust generated by drilling can be controlled, and the dust control performance is significantly improved.