中文摘要：

黏土矿物是煤层中最重要的矿物质,煤层中有机质与黏土矿物复合能改善黏土矿物对甲烷的吸附能力,因而煤储层中黏土矿物对甲烷的吸附不容忽视。分别选取黏土矿物含量较高的煤层夹矸和纯黏土样品,采用X-射线衍射、红外光谱及扫描电镜表征,并进一步分析了样品中总有机碳（TOC）含量、有机质的类型和成熟度,结合孔径、孔隙体积和比表面积测定结果,探讨造成夹矸型和非煤黏土矿物甲烷吸附能力差异的主要原因,研究影响夹矸型黏土矿物吸附能力的控制因素。结果表明：夹矸型黏土矿物对甲烷的吸附能力依次为铵伊利石〉高岭石〉伊利石〉金云母;单纯的外表面积大小并不能完全反应出黏土矿物的甲烷吸附特性,需结合不同黏土矿物层间域等多方面因素综合考虑;有机质含量较高的夹矸型黏土矿物样品比纯黏土样品具有更多的微小孔隙,尤其是孔径小于6 nm的孔隙,对样品比表面积的增加起到了关键作用,进而也增强了其甲烷吸附能力。通过分析黏土矿物的甲烷吸附贡献率发现,黏土矿物及其有机复合体具有较强的甲烷吸附能力,在煤层夹矸中对甲烷的吸附贡献较大。

英文摘要：

Clay minerals are the most important minerals in coal seams, and the compound of clay minerals and organic matter can improve the adsorption capacity of clay minerals on CH4, so the adsorption of clay minerals cannot be ig- nored. The coal gangue with the high content of clay minerals and pure clay samples were characterized by X-ray dif- fraction, infrared spectroscopy and scanning electron microscope, and also total organic carbon （TOC） , the type and maturity of organic matter were analyzed. Meanwhile, the results of the pore diameter, pore volume and specific surface area were combined to analyze the main factors influencing the clay minerals adsorption capacity by comparing the CH4 adsorption of the pure clay minerals with the clay mineral from coal gangue. The results show that the adsorption capacity of different clay minerals is as following：ammonium illite 〉 kaolinite 〉 illite 〉 phlogopite. Moreover, the sur- face area cannot fully reflect the characteristics of CH4 adsorption, and the interlayer and other factors of clay minerals should also be taken into consideration. Meanwhile, the clay mineral samples from coal gangue with high TOC have more micro pores than the pure clay minerals samples. The micro pores, especially those less than 6 nm, play a key rolein the increase of the specific surface area, furthermore enhance bution rate of CH4 adsorption by clay minerals, it was found that the CH4 adsorption capacity. By analyzing the contri- clay minerals and their complexes have high CH4 ad- sorption capacity and contributions ratio, especially in the coal gangue