摘要
通过采用传统的岩石薄片显微鉴定和现代化扫描、透视电子显微镜、X射线衍射分析、差热分析等方法对9煤至奥灰间隔水层岩石的结构、构造、矿物成分进行了综合测试,微观研究表明,区内9煤至奥灰间地层中铝含量较高,隔水层中泥质岩粘土矿物主要以叶腊石、伊利石、高岭石为主,大部分岩石遇水后稳定,无崩解现象。其中在煤系地层中发现大量叶腊石。初步分析认为是受后期强烈岩浆岩活动影响,发生热液蚀变而形成。通过压汞实验测试了10个隔水层岩样空隙结构,原岩状态下,9煤至奥灰含水层间隔水层空隙度很低,呈现致密状态,因而应具有良好的隔水能力。
Through conventional rock thin section microscopic examination and modern scanning electron microscopic examination, X-ray diffraction and differential thermal analyses carried out integration testing of rock structure, texture and mineral composition of confining beds between No.9 coal seam and Ordovician limestone. The microcosmic study indicated that aluminum content is rather high in strata between No.9 coal seam and Ordovician limestone, clay minerals in confining bed argillaceous rocks are mainly pyrophyllite, illite and kaolinite, most rocks are stable in water, no disintegration happened. In which large amount of pyrophyllite have found in coal measures strata, preliminarily considered that it is a result of paulopost hydrotheImal alteration caused by strong magmatic activities. The mercury injection porusimetry tested pore texture of 10 confining bed rock samples, found that under original state, confining beds between No.9 coal seam and Ordovician limestone have low porosity, compact and good impermeable property.
出处
《中国煤田地质》
2007年第6期19-20,35,共3页
Coal Geology of China
关键词
隔水层
微观研究
叶腊石
章村三井
邢台矿区
confining bed
microcosmic study
pyrophyllite
Zhangcun No.3 coalmine
Xingtai mining area
