湖南区域构造演化及瓦斯地质特征研究

Study on Regional Tectonic Evolution and Gas Geological Characteristics in Hunan

湖南省境内地质构造复杂,由于构造作用力的联合及复合,煤层破坏严重,厚度发生较大变化,构造煤普遍发育,剧烈的岩浆热变质作用又增高了煤的变质程度,对瓦斯赋存有重大影响。湖南特殊的区域构造演化特征使境内瓦斯分布呈现出分带的特性,共划分为两个高突瓦斯带、一个高瓦斯带和五个低瓦斯带。

The geological structure in Hunan province is complex,because of the combination and compound of tectonic forces,the coal seam is destroyed seriously,the thickness changes greatly,the tectonic coal is generally developed,and the violent magmatic thermal metamorphism increases the degree of coal metamorphism,which has a great influence on gas occurrence.The characteristics of regional tectonic evolution in Hunan make the gas distribution in the territory show the characteristics of zonation,which is divided into two high outburst gas zones,one high gas zone and five low gas zones.