基于最小二乘法的上隅角瓦斯浓度变化规律分析

Change law of gas concentration in upper corner based on least squares method

采用最小二乘法对试验区域16122-1工作面上隅角瓦斯浓度进行分析,通过在试验区域16122-1工作面回采期间对工作面风量Q、日产量A以及上隅角瓦斯浓度C上三个参数进行数据监测,将工作面风量、日产量分别与上隅角瓦斯浓度拟合得出了瓦斯浓度变化曲线,并对拟合方法、拟合效果进行分析。结合现场实际条件,分析了拟合曲线不与理论完全吻合的原因,再次通过分析上隅角瓦斯浓度与工作面风量、工作面日产量的相关性,得出的结论是上隅角瓦斯浓度随着工作面日产量的增大而升高,减小而降低;随着工作面风量的增加而降低,减小而升高,同时表明了用最小二乘法进行拟合是可行、有效的。

During the period of 16122-1 working face coal winning, monitor the working face air volume Q, daily output A, gas concentration in upper comer C. Fit the above three data and get gas concentration variation curve. Analyse the fitting method and effect. The fitting results don＇t match perfectly with the theoretical results. Combined with the actual conditions, investigate the reasons. The results show that, the change of C and A is synchronized, while Q has the opposite effect. The least squares method is achievable.