浅谈阜新煤田东梁区辉绿岩活动对煤层气含量的影响

东梁区岩浆岩为第三纪喜山期产物,岩性为辉绿岩,呈高角度岩墙侵入。共组合25条辉绿岩墙,其中20条分布在煤层可采范围内。辉绿岩体以多种形式侵入到煤、岩层中,由于辉绿岩的侵入,引起局部煤层的热变质,受辉绿岩侵入体的烘烤作用,煤的变质程度增加,煤阶增高,煤层气含量增加。辉绿岩侵入体的烘烤作用使煤的煤层气最大吸附量增加,但煤变成天然焦后,储层煤层气含量降至很低甚至不含煤层气。

Influence of the moving law of diabase on the reserve of coal-seam gas in Fuxin Dongliang district

Dongliang district of diabase which is the product of Jurassic-cretaceous Himalayan period.The property of the rock is Fai green rock and they invades in the way of a high Angle rock wall.Combined 25 Fai green rock walls altogether,there are 20 in the coal seam recoverable range among them.Fai green rock makes incursions into coal and rock with a variety of ways,which cases hot metamorphic of part coal seam due to its invasion.The degree of coal metamorphism increases,the coal rank heightens,and the content of the Coalbed Methane increases on account of the baking of Fai green rock intrusion body.The affect of baking of Fai green rock intrusion body increases the ultimate adsorption of coal seam gas,but when the coal turns into natural coke,the content of coal seam gas of the reservoir will turn into so low that none of the coal seam gas would contain.