为确定大宁-吉县地区5号煤层含气量差异分布的主控因素,在综合选取影响含气量的地质因素基础上,采用灰色关联分析法,定量分析各地质因素对含气量分布的影响程度,得出了各影响因素与含气量的关联度为0.512 55～0.843 29,均大于0.5,其中地下水矿化度的关联度最大,其余因素关联度相差不大。结果表明:该地区主要地质因素对5号煤层高含气特征的形成均较为有利,含气量差异分布的主控因素为构造作用控制下的水文地质条件,其他因素的控制作用不十分明显。

In order to determine primary factors affected to the difference distribution of the seam gas content in No.5 seam in Daning-Jixian Area, based on the ge ological factors affected to the comprehensive selected gas content, a grey relevant analysis method was applied to quantitatively analyze the influence degree of each geological factor affected to the gas content distribution.The results showed that the relevance degree of each influence factor and gas content was 0.512 550 .843 29 a nd was over 0. 5.Among those, the relevance degree of the underground water mine ralization was max and the relevance of the other factors would be less different.Th e results showed that the primary geological factors in the area would be favorable to the formation of the No.5 seam high gas features, the primary factors of the gas C ontent difference distribution would be the hydrogeology conditions under the structure role control and the control role of the other factors would not be obvious.

国家科技重大专项资助项目(2008ZX05034；2011ZX05034)；