采空区遗煤氧化标志性伴生气体对瓦斯爆炸的影响

发布时间：2018-03-17 20:34

本文选题：采空区遗煤氧化　切入点：标志性伴生气体　出处：《煤炭科学技术》2017年04期 　论文类型：期刊论文

【摘要】：为了研究采空区遗煤氧化过程中标志性伴生气体对瓦斯爆炸的影响,通过对煤样进行试验测定,确定遗煤升温不同阶段的标志性伴生气体。基于动力学模型CHEMKIN中Senkin的GRI 3.0甲烷燃烧反应机理,在定容条件下设定加速、激烈氧化2个阶段瓦斯与标志性伴生气体体积分数,模拟计算瓦斯爆炸温度、压力、中间产物及关键反应步敏感性系数。结果表明:随着标志性伴生气体体积分数的增加,在加速氧化阶段,爆炸时间提前了约0.003 0 s,爆炸压力及温度分别升高了约0.012 MPa和30 K;在激烈氧化阶段,爆炸时间提前了约0.000 2 s,爆炸压力升高了约0.007 MPa,两阶段自由基OH体积分数均逐渐降低,促进甲烷生成的关键反应步敏感性系数降低幅度均较大,即促进了瓦斯爆炸。
[Abstract]:In order to study the influence of the symbolic associated gas on the gas explosion in the process of coal oxidation in goaf, the coal sample was tested and measured. Based on the mechanism of GRI 3.0 methane combustion reaction of Senkin in the kinetic model CHEMKIN, acceleration was set under constant volume condition, and volume fraction of gas and signature associated gas in two stages of intense oxidation were determined. The sensitivity coefficients of gas explosion temperature, pressure, intermediate product and key reaction step were calculated by simulation. The explosion time was about 0.0030 s, the explosion pressure and temperature increased about 0.012 MPa and 30 K, respectively, and in the stage of intense oxidation, the explosion time was about 0.000 2 s, the explosion pressure increased about 0.007 MPA, and the OH volume fraction of free radical decreased gradually in both stages. The sensitivity coefficient of the key reaction step to promote methane formation is reduced greatly, that is to say, the gas explosion is promoted.
【作者单位】：辽宁工程技术大学安全科学与工程学院;矿山热动力灾害与防治教育部重点实验室(辽宁工程技术大学);新疆工程学院安全工程系;煤科集团沈阳研究院有限公司煤矿安全技术国家重点实验室;
【基金】：国家自然科学基金资助项目(51174109) 国家科技重大专项资助项目(2011ZX05041-003)
【分类号】：TD712.7

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