摘要
针对安阳-鹤壁煤田普遍存在的太原组煤层瓦斯含量低于其上覆的山西组煤层的情况,通过分析安-鹤煤田地质构造形成与演化,以及煤田深部太原组煤层瓦斯和下伏奥陶系灰岩通过裂隙作用发生一定水力联系,确定太原组煤层游离瓦斯通过裂隙渗透作用溶入奥陶系灰岩水,并将瓦斯带走,以泉群形式出现时将瓦斯排到大气中,是造成太原组煤层瓦斯含量普遍偏低的原因。
Aiming at the widespread condition that Anyang-Hebi coalfield in taiyuan group of coal seam gas content is lower than its overlying coal seam of Shanxi group, analyzes formation and tectonic evolution of An-He coalfield geological structure, karst water formed the spring group in the eastern part of the downthrow side of Qingyangkou fault,Through hydraulic connection, confirming that taiyuan group of coal seam gas content dissolve into ordovician limestone aquifer by fracture penetration effect and take it away, putting gas into the atmosphere when spring field from the surface, which leads to taiyuan group coal seam gas content is low generally.
出处
《煤炭技术》
CAS
北大核心
2016年第8期86-88,共3页
Coal Technology
基金
国家“十二五”重大专项(2011ZX05040-005)
长江学者和创新团队发展计划(IRT1235)
国家自然科学基金项目(41102094)
关键词
煤层瓦斯
强径流带
岩溶水
coal seam gas
strong seepage flow zones
karst water
