淮北煤田宿东矿区芦岭煤矿煤层气赋存地质条件及主控因素分析

Analysis of Geological Conditions and Main Controlling Factors of Coalbed Methane Occurrence in Luling Coal Mine of Sudong Mining Area

摘要: 通过主采煤层含气量及组分测试，结合宿东矿区芦岭煤矿主采煤层的煤岩与煤质、地质构造以及煤层顶底板岩性等特征，分析了主采煤层煤层气特征主控因素。结果表明：8煤层含气量在5.75~9.18 m³/t之间，10煤层含气量在5.91~10.03 m³/t之间，含气量与煤层埋深均呈正相关关系；在空间分布上，含气量呈“中部较高，南北稍低”的分布趋势。8和10煤煤层气组分均以甲烷为主，与埋深呈正相关关系。8煤层顶底板以泥岩为主，10煤层顶底板以砂岩和泥岩为主，有较好的封盖条件。

Abstract: By testing the gas content and component of the main mining seam, combined the characteristics of coal rock and coal quality, geological structure and lithology of the top and bottom of the coal seam in the Luling coal mining area of the Sudong mine, analyzed the main controlling factors of the coalbed methane (CBM) characteristics of the main mining seam. Results show that the gas content of the 8 coal seam ranges from 5.75 to 9.18 m³/t, and that of the 10 coal seam ranges from 5.91 to 10.03 m³/t. The gas content is positively correlated with the burial depth of the coal seam; in terms of spatial distribution, the gas content shows a distribution trend of “higher in the central part and slightly lower in the north and south”. Both 8 and 10 CBM fractions are dominated by methane and show a positive correlation with depth of burial. The top and bottom plates of the 8 coal seam are mainly mudstone, and the top and bottom plates of the 10 coal seam are mainly sandstone and mudstone, which have good sealing conditions.