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运用X射线衍射、傅里叶红外光谱以及偏光显微镜等手段对内蒙古准格尔煤田哈尔乌素矿区主采6号煤层夹矸的矿物成分进行了分析,结果表明:勃姆石在6号煤夹矸中分布广泛,尤其是在煤层中部层位局部含量高达87%,底部层位勃姆石含量逐渐减少,而在煤层的上部层位则基本不含勃姆石。结合偏光显微镜分析推断其形成方式主要为2种,其一是高岭石脱硅蚀变形成;其二是泥炭聚集时期,由来源于盆地边缘隆起的古风化壳的Al(OH)3胶体在成岩作用过程中经压实脱水形成。
The mineral composition of the No. 6 coal seam in the main mining area of Haerwusu Mine in Zhungeer Coalfield, Inner Mongolia, was analyzed by means of X-ray diffraction, Fourier transform infrared spectroscopy and polarized light microscope. The results show that the content of boehmite in No. 6 coal The gangue is widely distributed, especially in the middle layer of the coal seam as high as 87%, boehmite content gradually decreases in the bottom layer, and boehmite in the upper layer of the coal seam. According to the analysis of polarized light microscopy, it is concluded that there are mainly two kinds of formation methods, one of which is the desalination of kaolinite; the other is the period of peat accumulation. The Al (OH) 3 colloid of the ancient weathering crust erected from the margin of the basin Diagenesis process formed by compaction and dehydration.