摘要
基于云驾岭煤矿瓦斯涌出量异常变化的现象,收集地质勘查及煤矿生产期间揭露的地质构造及瓦斯信息,运用瓦斯地质理论,从煤层瓦斯生成、运移、储存的角度,研究岩浆岩侵入、煤层埋深和断层等地质因素对2号煤层煤质、生烃能力、煤层渗透性、瓦斯含量等参数以及煤层瓦斯赋存的影响。研究结果表明岩浆侵入提高了2号煤层的变质程度、瓦斯储集能力和渗透性,促进了煤层二次生烃,同时岩浆热液产生的高温高压作用使煤层瓦斯大量逸散;岩浆侵入对煤层瓦斯的生成、运移和储存均产生了影响,是煤层瓦斯赋存的主要控制因素,断层特征及分布影响了瓦斯的储存和运移,煤层埋深影响了瓦斯的储存,断层和煤层埋深是煤层瓦斯赋存的一般影响因素。
Considering the abnormal phenomena of gas outflow in the Yunjialing coalmine, based on collected geological exploration data and revealed geological structure and gas information during coalmine production, using gas geological theory, from coal seam gas generation, migration and storage points of view, studied impacts from geological factors including magmatic intrusion, coal seam bur- ied depth and faults on coal quality of coal seam No.2, hydrocarbon generation capacity, coal seam permeability, gas content and coal seam gas hosting. The result has shown that the magmatic intrusion has heightened metamorphism degree, gas reservoir capacity and permeability of coal seam No.2, promoted coal seam secondary hydrocarbon generation, meanwhile, magmatic hydrothermal produced high temperature and high pressure made coal seam gas plentiful dissipation. Magmatic intrusion impacted coal seam gas generation, migration and storage all, thus the main controlling factor to coal seam gas hosting; fault characteristics and distribution impacted gas storage and migration, coal seam buried depth impacted gas storage, thus fault and coal seam buried depth are fairly general impacting factors.
出处
《中国煤炭地质》
2014年第2期25-29,共5页
Coal Geology of China
关键词
瓦斯涌出量
瓦斯赋存
岩浆岩侵入
煤层渗透性
瓦斯运移
云驾岭煤矿
gas outflow rate
gas hosting
magmatic intrusion
coal seam permeability
gas migration
Yunjialing coalmine
