阜新王营井田浅成气的成藏与岩浆活动

Feature of hypablyssal coal gas and the magma action in Fuxin Wangying coalfield

王营井田是产气率较低,裂隙又很不发育的长焰煤井田,但该井田却很可能成为很具有开发价值的煤成气田。本文从该井田的地质特征—成煤期后有剧烈的岩浆活动这一现象出发,依据井下瓦斯突出及矿井抽放瓦斯的实际资料,同时运用煤成气的生成、储藏、运移理论,科学分析了该井田能产出大量煤成气的原因—即岩墙、岩床不但提高了长焰煤的产气率,而且也造就了煤成气的储运场所和运移通道。从而得出了岩浆活动是促成浅产质煤能成为可资开发的煤成气田的重要因素这一结论。

Wangying Coalfield is a burning coalfield with low rate of gas and undeveloped crack. But this Coalfield will be a valuable coal gas field to be developed in the future. Starting with the geological feature of Wangying coalfieldthe phenomenon of a drastic magma action after the coal was formed .The paper analyzed the reason why the field produced so much coal gas because of the magma bed. On one hand it improves the rate of gas by burning coal; on the other hand it also form much large gas breaking space and gas migration pass way. According to the practice data of gas pour out and draw out in Wangying Coalfield. Finally, we draw a conclusion that magma action is the main factor by which the shallow produced-coalfield was changed into a valuable developed coal gas field.