Numerical Simulation Analysis of the Influence of Entrance Wind Speed on the Wind Speed Distribution of Coal Mine Tunnel Sections
DOI:
https://doi.org/10.54097/ajst.v7i3.13399Keywords:
Mine ventilation, Tunnel cross-section, Tunnel wind speed, Inlet wind speed, Numerical simulation.Abstract
In order to further accurately obtain the wind speed of coal mine tunnels and achieve intelligent ventilation, taking the Wuhushan coal mine tunnel as the research object, the COMSOL Multiphysics numerical simulation software was used to simulate and analyze the influence of inlet wind speed on the wind speed distribution on the tunnel section, and the wind speed distribution law of the semi circular arch tunnel section under different inlet wind speed conditions was obtained. The research results indicate that the wind speed contour is basically parallel to the tunnel wall, and the wind speed gradient near the tunnel wall is large, while the wind speed gradient in the middle of the tunnel is small. The thickness of the boundary layer decreases with increasing wind speed. The ratio of the maximum wind speed to the average wind speed of the tunnel section is approximately 1.2125. The distance between the average wind speed line of the semi circular arch tunnel and the roof is 10.76%~11.02% of the tunnel height, and the error between the simulation results and theoretical calculation results is within 4%. The research results provide strong support for precise measurement of the average wind speed at fixed points in coal mine underground tunnels.
Downloads
References
Wang Guofa, Wang Hong, Ren Huaiwei, et al. 2025 Scenario objectives and development path of smart coal mines [J]. Journal of Coal Industry, 2018,43 (02): 295-305.
Zhou Fubao, Wei Lianjiang, Xia Tongqiang, et al. Principles, key technologies, and preliminary implementation of intelligent ventilation in mines [J]. Journal of Coal Industry, 2020,45 (06): 2225-2235.
Wang Heng, Qiu Liming, He Xueqiu, et al. Study on the distribution law of wind speed at the cross-section of coal mine tunnels under different factors [J]. Mining Research and Development, 2022,42 (07): 125-132.
Guo Weizhou, Shen Bin, Wang Yang, et al. Construction and application of intelligent ventilation system in Hulusu Coal Mine [J]. Coal Mine Safety, 2022,53 (09): 233-238.
Hu Jianhua, Zhao Yang, Zhou Tan, et al. Multiple factors affecting the distribution of wind speed on the cross-section of uneven roof tunnels [J]. Journal of Central South University, 2021,28 (07): 2067-2078.
Hao Yuanwei, Chen Kaiyan, Jiang Zhongcheng, et al. Correction and processing of tunnel wind speed monitoring values based on CFD simulation [J]. Coal Mine Safety, 2011, 42 (02): 1-3+7.
Li Yong, Chu Zhaoxiang, Ji Jianhu, et al. Numerical simulation of airflow and temperature fields in excavation tunnels [J]. Coal Science and Technology, 2014,42 (S1): 142-145+148.
Zhao Wenhua. Numerical simulation of flow field distribution during ventilation process in coal mine tunnels [J]. Coal and Chemical Industry, 2017,40 (04): 74-75+79.
Lu Guangli, Wu Zanlong, Zhao Jianfeng. Numerical simulation of airflow changes in tunnels at different turning angles [J]. Mining Research and Development, 2019, 39 (12): 116-121.
Wang Hanfeng. Simulation study on positioning and monitoring of average wind speed points in Fluent tunnel cross-section [J]. Coal Science and Technology, 2015,43 (08): 92-96.
Sun Liang, Sun Zhenping. Research on the distribution law and monitoring of wind speed in large section tunnels of mines [J]. Coal Technology, 2022,41 (04): 97-100.