中文摘要：

通过物理机制分析，建立合理的巷道物理模型，并对燃烧爆炸反应模型中阻力系数CD和湍流特征尺度Lt进行修正，模拟实际巷道内壁粗糙情况对瓦斯爆炸传播过程的影响，为模型计算提供修正参数。研究结果表明，巷道壁面条件对瓦斯爆炸过程有很大影响；CD和Lt越大，爆炸峰值超压越大；当CD=3、Lt=0．008时，模拟结果与实验值的偏差最小。

英文摘要：

To investigate the effects of the laneway surfaces on the methane explosion, the mechanism of the methane explosion was analyzed and a physical model for the laneway was proposed. Based on the above, numerical simulations were conducted to explore the effects of the inner surface roughness on the explosion propagation by modifying the drag coefficient and the turbulent length scale in the re- action model of the methane explosion. The simulated results display that the laneway surface can in- fluence evidently the methane explosion in it. The higher the values of the drag coefficient and the tur- bulent length scale, the higher the peak overpressure of the methane explosion. And the simulated re- sults correspond best to the experimental data when the drag coefficient and the turbulent length scale are 3 and 0. 008, respectively.