河南省崤熊构造区主采煤层瓦斯地质规律

Main Mineable Coal Seam Gas Geological Pattern in Xiaoxiong Structural Belt,Henan Province

采用评价、校正后的174个可用钻孔煤层瓦斯含量点绘制了崤熊构造区主要煤田主采煤层瓦斯含量等值线图,通过分析比较各煤田瓦斯地质特征,总结了区域构造对煤层瓦斯分布的控制规律。崤熊构造区主要煤田主采煤层瓦斯含量总体较低,平均值基本在6 m^3/t以下。煤变质程度低,以长焰煤、气肥煤为主,导致煤层瓦斯含量总体偏低。崤熊构造区受秦岭造山带的影响,在先期逆冲推覆构造的基础上,叠加了后期的伸展构造,不利于煤层瓦斯的保存。

Through assessed, checked data from 174 boreholes coal seam gas content points mapped out main coalfields main mineablecoal seam gas content isogram in the Xiaoxiong structural belt. Then through analytic comparison of various coalfields gas geologicalcharacteristics, summed up regional tectonics control on coal seam gas distribution. Main coalfields main mineable coal seam gas con-tent is rather low as a whole with average value less than 6m^3/t. Coal metamorphism degree is low, mainly long flame coal and gas-fatcoal, thus the congenital factor of overall low coal seam gas content. Impacted by the Qinling orogenic belt, in Xiaoxiong structural belt,on the basis of earlier thrusting nappe structure, has superimposed posterior extensional structure, and thus went against coal seam gaspreservation.