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为研究煤矿火区封闭时燃烧生成气体对瓦斯爆炸的影响,选取平庄瑞安煤矿褐煤作为试验煤样,利用管式炉程序升温和气相色谱仪进行生成气体成分分析试验,得到风量分别为40,80,120,160和200 m L/min时,褐煤燃烧生成碳氢化物气体的初现温度及其体积分数变化规律。结果表明,风量增加,碳氢化物气体初现温度升高;随着温度升高,CH_4气体生成量增加,在348℃时达到最大值,C_2H_6,C_3H_8,C_2H_4与C_2H_2气体生成量也增加,在400℃时达到最大值;相同温度下,随着风量增加,碳氢化物生成量减小,且燃烧阶段CH_4,C_2H_6,C_3H_8,C_2H_4生成量与风量呈指数关系变化,C_2H_2生成量与风量呈线性关系变化。
In order to study the influence of gas generated by combustion on the gas explosion when closed, the lignite in Pingzhuang Ruian Coal Mine was selected as the test coal sample, and the gas composition analysis test was conducted by using tube furnace temperature and gas chromatograph to get gas volume of 40, At 80, 120, 160 and 200 m L / min, the changing law of initial temperature and volume fraction of the combustion of lignite to hydrocarbon gas is shown. The results show that when the air volume increases, the initial temperature of the hydrocarbon gas increases. With the increase of temperature, the amount of CH 4 gas increases and reaches the maximum at 348 ℃, and the generation of C 2 H 6, C 3 H 8, C 2 H 4 and C 2 H 2 gases also increases. 400 ℃. At the same temperature, with the increase of air volume, the amount of hydrocarbon generation decreased, and the formation amount of CH_4, C_2H_6, C_3H_8 and C_2H_4 varied exponentially with the amount of air during the combustion stage. The amount of C_2H_2 produced was linear with the air volume Relationship changes.