基于最小二乘法的工作面上隅角瓦斯浓度分析方法研究

Study of methane concentration in upper corner based on the least square method

我国开采的煤矿中,许多煤矿是高瓦斯矿井,在开采的过程中,很容易造成工作面上隅角瓦斯浓度超限,在遇到高温热源时容易造成瓦斯燃烧和爆炸事故。因此,有必要对上隅角瓦斯浓度进行观测分析。本文采用最小二乘法对实测工作面上隅角的瓦斯浓度进行分析,拟合得出瓦斯浓度变化曲线,并对拟合方法、拟合效果进行了分析,结果表明用最小二乘法进行拟合是可行、有效的。最后,引入了相关性系数,分析了上隅角瓦斯浓度与工作面瓦斯浓度的相关性,以此分析了上隅角瓦斯的来源。

There are many high methane mines in China＇s coal mines.During the process of mining,overrun of methane concentration in the working face＇ upper corner is easily caused.When there exists high temperature heat source,accidents of methane combustion and explosion are easily caused by methane overrun.Therefore,it is necessary to monitor and analyze the methane concentration in the upper corner.In this paper,the least square method is used to analyze the methane concentration of a measured working face＇ upper corner.The methane concentration changing curve is obtained by fitting.The fitting method and fitting effect are analyzed.The results indicate that the fitting based on the least square method is feasible and valid.At last,the correlation between the upper corner methane concentration and the working face methane concentration is analyzed by the related coefficient.The source of methane in the upper corner is analyzed by correlation.