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Research on Gas Exploration Shock Wave Spread Law via One-Way Bifurcation Pipeline

机译：单向分叉管道的瓦斯探测激波传播规律研究

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摘要

In order to research on gas exploration shock wave spread law via a one-way bifurcation pipeline, the gas exploration pipeline experimental system and numerical calculation model were established. By adopting the comparative analysis of experiments and numerical modeling, it conducted researches on the attenuation and shunt characteristics of the gas exploration shock wave via the one-way bifurcation pipeline and obtained the computational formulas for shock wave attenuation coefficients of branch pipelines and straight pipelines and shock wave shunt coefficients of branch pipelines. As the research result showed that when the pipeline bifurcation angle was fixed, the larger the shock wave overpressure was, the larger the overpressure attenuation coefficients of straight pipelines and branch pipelines were. When the shockwave overpressure was fixed and the one-way bifurcation pipeline angle increased, the shock wave overpressure attenuation coefficients of branch pipelines would be aggregated and the shock wave overpressure attenuation coefficients of straight pipelines would be decreased, which reflected the shunting action of the shock wave in branch pipelines and straight pipelines; the larger the branch pipeline bifurcation angle, the smaller the shunting action for straight pipelines. The research achievements in the paper had important significance for the assessment of structures damage in mine laneways gas exploration accidents and installation of the antiexploration manhole cover, which further enriched gas exploration spread theory.
机译：为了研究通过单向分叉管道的天然气勘探激波传播规律，建立了天然气勘探管道实验系统和数值计算模型。通过对实验和数值模拟的对比分析，对单向分叉管道的瓦斯探测冲击波的衰减和分流特性进行了研究，得出了分支管道和直管的冲击波衰减系数的计算公式。分支管道的冲击波分流系数研究结果表明，当管道分叉角固定时，冲击波超压越大，直管和支管的超压衰减系数越大。当冲击波超压固定且单向分叉管道角度增加时，分支管道的冲击波超压衰减系数会合，直管的冲击波超压衰减系数会减小，这反映了冲击波的分流作用在支管和直管中波动;分支管道的分叉角越大，直管道的分流作用越小。本文的研究成果对于评价巷道瓦斯勘探事故中的结构破坏和安装反爆井盖具有重要的意义，进一步丰富了瓦斯勘探的传播理论。

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