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通过对大量钻孔资料分析,运用沉积学、煤田地质学的基本理论和方法,分析了淮北煤田刘店井田二叠系下统山西组和下石盒子组的沉积环境和成煤演化史。研究表明,山西组和下石盒子组煤层都形成于三角洲平原环境,其中,山西组煤组形成于三角洲低速度的建设与高速度的建设的过渡时期;下石盒子组煤组形成于高速度建设型的三角洲平原环境。运用标志层、层间距、煤层顶底板岩石特征、煤质特征、微量元素地球化学特征等综合分析方法,对7、10煤层进行了对比判定。
Based on the analysis of a large number of drilling data and the basic theories and methods of sedimentology and coalfield geology, the depositional environment and coal evolution of Permian Xiaxian Shanxi Formation and Xiashihezi Formation of Liudian minefield in Huaibei coalfield are analyzed. The results show that the coal seams of Shanxi Formation and Xiashihezi Formation are all formed in the delta plain environment, in which the Shanxi Formation coal formation was formed during the transition period between the construction of the delta low speed and the construction of high speed. The Xiashihezi Formation coal formation was formed at high speed Constructive delta plain environment. Based on the comprehensive analysis methods such as sign layer, interlayer distance, top and bottom rock features of coal seam, characteristics of coal quality and trace element geochemical characteristics, the coal seam No. 7 and No.10 were determined.