岩浆侵入对宣东二矿煤层瓦斯赋存的控制

The Control of Magma Intrusion for Gas Occurrence in Xuandong No.2 Coal Mine

宣东二矿辉绿岩沿Ⅲ3煤层顶板大面积侵入,依据矿井现有的瓦斯地质资料,结合井下观测和实验室测试数据,分析Ⅲ3煤层岩浆岩分布特征,岩浆侵入与煤层变质、变形、煤层瓦斯生成和保存等之间的关系。认为岩浆以岩床形式沿煤层顶板侵入提高了Ⅲ3煤层煤的变质程度,有利于瓦斯的生成和保存,加剧了煤层的变形破坏,对构造煤的形成具有重要作用。

Due to the widespread intrusion of diabase in roof of Ⅲ3 coal seam in Xuandong No.2 Coal Mine.Using existing gas-geology data in coal mine and other data from test in laboratory and observation in underground mine,the distribution characteristics of magma and the relations about metamorphism of coal bed,deformation of coal bed,gas-generating conditions,gas-preserving conditions with magma intrusion are analyzed.The conclusions are that magma intrsion improved metamorphic grade,formed advantageous gas-generating and gas-preserving conditions,deepened deformation of coal bed and had important control role to form deformed coal in Ⅲ3 coal seam of Xuandong No.2 coal mine.