摘要
根据宣东二矿Ⅲ3煤层实测煤质、煤层瓦斯数据,从煤层瓦斯生成、运移、储存角度,研究了上覆岩床对煤层煤质、煤层生烃量、瓦斯含量和瓦斯压力等煤层瓦斯赋存状态参数的影响,认为受上覆岩床影响,煤变质程度提高,由长焰煤变成气煤-焦煤,煤层Rmax、Cdaf值与辉绿岩床厚度呈明显的正相关,与Ⅲ3煤层和辉绿岩床间距呈明显的负相关,煤层最大吸附瓦斯能力由15m3/t提高到40m3/t,煤层瓦斯含量由3m3/t提高到9m3/t以上,多方面改变了Ⅲ3煤层瓦斯赋存状态和地质条件。
According to the Xuandong No.2 coalmine coal seam III actual measured coal quality, coal gas data, from coal seam gas generation, migration and reservation points of view, studied impact of overlying sills on coal seam gas hosting parameters of coal quality, hydrocarbon generation amount, gas content and gas pressure considered that： as affected by overlying sills, degree of coal metamorphism is increased, long flame coal becomes gas coal to coking coal. Romax, Cdaf values present positive c, orrelation with thickness of diabase sill obviously, and negative correlation with interval between coal seam III and diabase sill obviously. Coal seam maximmn gas adsorptive capacity has increased from 15m3/t to 40 m3/t; coal seam gas content from 3 m3/t to above 9 m3/t, thus extensively changed coal seam III gas hosting state and geological conditions.
出处
《中国煤炭地质》
2013年第1期16-19,共4页
Coal Geology of China
关键词
上覆岩床
煤质
煤层瓦斯参数
瓦斯赋存状态
overlying sill
coal quality
coal seam gas parameter
gas hosting state
