不同开挖方法对铁路瓦斯隧道通风效果的影响研究

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关键词：开挖方式；瓦斯隧道；数值模拟；隧道通风

中图分类号：U453.5 文献标志码：A 文章编号：1003-5168（2025）08-0075-05

DOI：10.19968/j.cnki.hnkj.1003-5168.2025.08.013

Abstract： [Purposes] This paper aims to explore the influence of diffrent excavation methods on the ventilation effect of railway gas tunnel.[Methods] Based on the actual engineering，numerical simulation analysis of gas tunnel under different excavation methods is carried out using FLUENT software.[Findings]The simulationresults show that the ventilation effectof the tunnel excavated bythebench method is better than that of the tunnel excavated by the fullsection excavation method，which reduces the gas concentration in the tunnel and makes it reach a stable state.The stable value of gas concentration is （204号 0 . 1 5 % ，and the required ventilation time is shorter，which is 15Os ;when the tunnel is excavated by the step method，the distance required for the tunnel gas concentration to reach a stable value is shorter.The stable point of the gas concentration is located at 2O m from the working face，and the influence range of the eddy current is smaller.[Conclusions] When the construction conditions permit，the step excavation method can more effectively enhance the ventilation effect of the fan and effectively reduce the gas concentration in the tunnel.

Keywords： excavation method; gas tunnel; numerical simulation; tunnel ventilation

0 引言

况，特别是煤系地层或富含瓦斯的地段，隧道在穿越过程中会面临瓦斯涌出的风险，因此，建设隧道时确保施工通风的有效性成了不可或缺的关键环在隧道建设过程中难免会遇到复杂的地质情节。（剩余4320字）