吉林省煤矿瓦斯赋存构造控制规律与分带划分

Tectonic control rule and zoning division of gas occurrence in Jilin Province

瓦斯赋存规律认识不清是导致煤矿瓦斯突出灾害频发的根本原因.应用瓦斯赋存地质构造逐级控制理论,结合吉林省煤矿瓦斯地质图编制资料,探讨了吉林省煤矿瓦斯赋存构造控制规律,进行了瓦斯分带划分及特征分析.研究结果表明,成煤后的多期岩浆作用使吉林省煤变质程度普遍加深,生烃能力增强,加之围岩透气性差,是吉林省大部分煤田表现为高瓦斯的主要原因.将吉林省煤矿瓦斯赋存分布划分为4个高突、高瓦斯带和2个瓦斯带,即通化高突瓦斯带、蛟河辽源梅河高突瓦斯带、营城长春高突瓦斯带、万红高瓦斯带、舒兰瓦斯带和长白山瓦斯带.

Unclear understanding of gas occurrence rule is a fundamental cause of frequent gas outburst disaster.Basing on gas occurrence tectonic control theory step by step,and combining with the datum of Jilin Province gas-geology map,tectonic stepwise control rule and zoning division of gas occurrence have been discussed.The results show that multiphase magmatism has increased the coal metamorphism of Jilin Province.Gas content and emission quantity in most coal fields of Jilin Province are higher owing to coal metamorphism increasing,hydrocarbon productivity enhancing and the bad gas permeability of wall rock.The coalmine gas occurrence and distribution in Jilin Province were divided into four high and outburst gas zones and tow common gas zones,that is,Tonghua high and outburst gas zone,Jiaohe-Liaoyuan-Meihe high and outburst gas zone,Yingcheng-Changchun high and outburst gas zone,Wanhong high gas zone,Shulan gas zone and Changbaishan gas zone.