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首页> 外文会议>International Conference on Performance-based Fire and Fire Protection Engineering >Numerical Simulation of Spontaneous Oxidation Zone Distribution in Goaf under Gas Stereo Drainage
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Numerical Simulation of Spontaneous Oxidation Zone Distribution in Goaf under Gas Stereo Drainage

机译：气体立体声引流下脱落区自发氧化区分布的数值模拟

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摘要

In order to reduce spontaneous combustion in goaf at high methane mine, spontaneous oxidation zone distribution in goaf under methane stereo drainage is numerically studied by Fluent software. For the actual case of 8403 working face in Yang-Quan, According to the combination of gas velocity and oxygen concentration distribution, the oxidation zone distribution of horizontal and vertical surfaces are determined. The results shows that the distribution of spontaneous oxidation zone is asymmetrically at horizontal surfaces, the width of spontaneous oxidation zone of inlet side is wider than outlet side; at the vertical surfaces, the spontaneous oxidation zone is below 20 meters. By the contrast of the numerical oxygen concentration and measured oxygen concentration, good agreement is obtained, which shows that the numerical results is reliable. The methane concentration distribution shows that inner tail-roadway can effectively reduce methane concentration at working face's upper corner, and high drainage roadway can reduce methane concentration in the whole goaf.
机译：为了在高甲烷矿井中降低粘液中的自发燃烧，通过流畅的软件在数值研究甲烷立体声排水下的脱落区的自发氧化区分布。对于阳泉的8403个工作面的实际情况，根据气体速度和氧浓度分布的组合，确定水平和垂直表面的氧化区分布。结果表明，自发氧化区的分布在水平表面上是不对称的，入口侧的自发氧化区的宽度宽于出口侧;在垂直表面，自发氧化区低于20米。通过数值氧浓度的对比度和测量的氧浓度，获得了良好的一致性，表明数值结果是可靠的。甲烷浓度分布表明，内部尾部道路可以有效地降低工作面上的上拐角处的甲烷浓度，并且高排水道路可以降低整个乳头的甲烷浓度。

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