煤层顶板岩性特征是影响瓦斯含量产生局部变化的因素之一。
Lithological characteristics of the seam roof are one of factors, which lead gas content to change partially.
但由于该区煤层瓦斯含量高、浓度大，成为煤矿安全生产的主要影响因素。
But since the high coal bed gas content and concentration largely affected coalmine safety in production.
根据瓦斯含量数据，运用回归分析方法分析了各种控制因素对瓦斯含量的影响。
According to the gas content data, regression analysis is used to analyze the impact of various controlling factors to gas content.
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