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根据盘江煤电公司土城煤矿15158综采工作面的瓦斯实时监测数据,采用数理统计的方法,分析工作面顶板来压和推进速度与瓦斯涌出之间的关系。研究表明,工作面瓦斯涌出的总体平均水平与工作面采煤推进速度关系密切。每班割煤刀数多,总体平均瓦斯涌出量则大,明显呈现出与工作面从初采、稳产到收尾3阶段产量相应变化的3个区域。工作面平均绝对瓦斯涌出量与班产量有很强的负幂函数关系;顶板来压是工作面瓦斯峰值出现、导致瓦斯涌出不均衡的主要原因。
According to the real-time gas monitoring data of 15158 fully mechanized coal mining face in Pancheng Coal Mine of Panjiang Coal and Electricity Company, mathematical statistics method is used to analyze the relationship between the pressure and propulsion speed of the working face roof and the gas emission. The research shows that the overall average gas emission from working face is closely related to the speed of coal mining in working face. The number of coal cutter per class is much, and the average average gas emission is large. There are obviously three regions that change correspondingly with the first phase of production from the initial working face to the end of stable production. The average absolute gas emission from working face has a strong negative power function with the class output. Roof pressure is the main reason that the gas peak appears in the working face, leading to the uneven gas emission.