针对高瓦斯隧道工作面甲烷传感器的安装位置参数缺乏理论依据，首先建立隧道几何模型，根据湍流状态下的守恒方程、湍流动能方程、组分输送方程以及标准kε模型，模拟隧道工作面甲烷的分布情况。结果显示，风管位置和通风量对工作面甲烷体积分数的分布情况影响很大，正常通风状态下风管对面边墙位置甲烷体积分数高，通风量不足时，隧道顶部甲烷体积分数高。根据模拟结果和现场实测，确定甲烷传感器的安装位置和数量，并提出合理的布置要求。

A tunnel model is established and the concentration of gases at the working face of tunnels is simulated on basis of conservation equation, turbulence kinetic energy equation, constituent transportation equation and standard kε model, so as to study the layout of methane sensors at the working face of tunnels with high gas concentration. The study results show that: 1) The position of air duct and the ventilation volume have great influence on the distribution of methane; 2) Under normal ventilation condition, the methane concentration at the side wall on the side opposite to the air duct is high; when the ventilation volume is insufficient, the methane concentration at the tunnel crown is high. The installation positions and amount of methane sensors are determined and rational methane sensor layout requirements are proposed.