岩浆侵入破坏区煤层瓦斯地质规律

当岩浆侵入破坏煤系时,煤层瓦斯赋存规律会变得异常复杂。利用瓦斯地质学和煤层气地质学的方法,对岩浆侵入破坏区煤层瓦斯地质规律进行了研究,结果表明:岩浆侵入煤层与煤发生接触热变质作用,使生成的瓦斯量发生变化;使瓦斯的赋存状态发生变化,同时有可能导致瓦斯成分的改变;还会使其影响带的煤体结构遭到破坏,局部形成构造软煤分层,在岩浆岩体尖灭处及岩浆岩体与断层的组合部位是煤与瓦斯突出的有利地带。

Geological Regularity of Coalbed Gas in Magmatic Intrusion Area

When the magmatic intrusion destructed the coal seam,the occurrence rule of coalbed gas would become exceptionally complicated. By using the method of gas geology and coalbed gas geology,study was carried out on the gas geological rule in the magmatic intrusion and damage areas of the coal seam. The results showed that the magmatic intrusion into coal seam might cause the contact thermal metamorphism of coal and the change of the generated gas quantity; it might cause the change of gas occurrence state and gas compositions; it might also destruct the coal body structure in its affected area,cause part of a coal seam to form a structural soft slice; the places such as the thinning out place of structural coal and magmatic rock and the joint location of magmatic rock and fault group were the favorable zone of coal and gas outburst.