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近年来,由于煤矿开采深度的增加、煤与瓦斯突出事故的增多,使人们更加重视对瓦斯运动规律的研究。上隅角瓦斯超限现象在我国煤矿众多高瓦斯矿井中普遍存在,是影响矿井持续、稳定和安全生产的重要原因和事故隐患。为了探讨上隅角瓦斯聚积的根本原因,文章依据渗流理论,在分析采空区内瓦斯流态的前提下,通过建立采空区瓦斯渗流和分布的数学模型,定出边界条件,对采空区瓦斯流动分布规律进行了研究,为分析上隅角瓦斯浓度分布和预测上隅角瓦斯浓度提供了理论依据,对上隅角瓦斯的防治和煤与瓦斯突出预测具有实际意义。
In recent years, due to the increase of coal mining depth, the increase of coal and gas outburst accidents makes people pay more attention to the study of gas movement law. The gas overrun phenomenon in the upper corner is ubiquitous in many high-gas mines in China’s coal mines, and is an important reason and potential hazard affecting the continuous, stable and safe production of mines. In order to investigate the root causes of gas accumulation in the upper corner, based on the theory of seepage, based on the analysis of the gas flow in the goaf, the mathematical model of gas seepage and distribution in the goaf is established to set the boundary conditions. This study provides a theoretical basis for analyzing gas concentration distribution in the upper corner and predicting methane concentration in the upper corner, which has practical significance for the prevention and control of gas in the upper corner and prediction of coal and gas outburst.