焦作煤田瓦斯赋存规律及差异性原因分析Gas Hosting Pattern and Discrepancy Analysis in Jiaozuo Coalfield
张明杰,张大千,贾天让,范豪杰
摘要(Abstract)：
为厘清焦作煤田二1煤层瓦斯赋存规律及差异性原因,运用瓦斯赋存构造逐级控制理论,研究了焦作煤田瓦斯赋存规律及瓦斯生成与排放的过程,探讨了造成瓦斯赋存差异性明显的原因。深成变质作用叠加岩浆热液的岩浆变质作用是焦作煤田二1煤变质为三号无烟煤的主要原因,也是焦作煤田煤层瓦斯含量高的基础。煤层瓦斯的生、储、排过程研究表明,在喜马拉雅期之前整个焦作煤田的瓦斯赋存状态是相似的;喜马拉雅期形成的NW向峪河口正断层使两盘煤层上覆基岩厚度产生明显差异,是造成焦作煤田瓦斯赋存差异性的根本原因。峪河口断层将焦作煤田划分为东、西两个瓦斯地质单元,西部瓦斯地质单元瓦斯含量高、瓦斯突出灾害严重;东部瓦斯地质单元主要表现为低瓦斯区。
关键词(KeyWords)： 瓦斯赋存;地质构造;基岩厚度;瓦斯生成与排放;焦作煤田
基金项目(Foundation): 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)
作者(Author): 张明杰,张大千,贾天让,范豪杰
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