采空区导气裂隙带瓦斯渗流规律研究

    Study on Gas Seepage Law in Gas Conductive Fracture Zone of Gob

    • 摘要: 为掌握采空区覆岩导气裂隙带瓦斯渗流规律,采用理论分析与物理模拟的方法,对导气裂隙带进行了侧向区域划分,并对各分区瓦斯渗流特征进行了研究。结果表明:根据采动应力分布特征,采空区覆岩导气裂隙带在侧向上可分为压裂裂隙带、“O”形圈裂隙带、裂隙闭合带;在压裂裂隙带和裂隙闭合带瓦斯流态为达西渗流,在“O”形圈裂隙带瓦斯流态为紊流状态。

       

      Abstract: To master the gas seepage law in goaf gas conductive fractured zone of overlying strata, by physical simulation and theoretical analysis, the lateral partition for the gas conductive fracture zone is carried out and the gas seepage law in the lateral partition of the gas conductive fracture zone is studied. The results show that according to the stress distribution characteristics of mining, goaf gas conductive fractured zone of overlying strata can be divided into lateral fissure zone, gas conductive fissure "O" shape, compaction area in lateral; the gas in lateral fissure zone and compaction area flow is Darcy percolation, and the gas in gas conductive fissure "O" shape flow is turbulence.

       

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