陇东南地区5#煤聚煤规律研究
发布时间：2018-07-15 09:51
【摘要】：本文以华亭煤田和安口—新窑煤田现有的地质资料和前人研究成果为基础,综合煤田地质学、沉积学、岩石学、构造地质学等研究方法,野外观察和室内分析相结合,以聚煤规律为主要方向,总结出含煤盆地演化过程及煤层的展布规律。研究区处于鄂尔多斯盆地的西南边缘,六盘山东部地段,华亭煤田和安口—新窑煤田两个大型内陆型含煤盆地内,主要的含煤岩系是中侏罗统延安组,5#煤在研究区内厚度大、分布广、资源储量大,是主要开采煤层,5#煤属于低灰、低硫、中高挥发分煤,是理想的工业用煤。研究区内延安组含煤地层可以分为三段四个旋回,5#煤层位于第一段第Ⅰ旋回的中上部,采用煤层赋存特征、煤岩学特征和沉积学等研究手段,区内含煤地层主要发育有冲积扇相沉积、河流相沉积、湖泊三角洲相沉积和湖泊相沉积,其中发育在三角洲平原上的泥炭沼泽是5#煤的主要聚煤环境,在逐渐演变沉积成煤时,因为温暖潮湿的气候环境、大量成煤的古植物繁茂生长、良好的古地理环境和古构造的综合因素影响,形成了巨厚的5#煤层,通过对控煤因素分析总结出该煤层的聚煤规律,这对今后的开采、找煤工作提供了良好的依据。
[Abstract]:Based on the existing geological data and previous research results in Huating coalfield and Ankou-Xinyao coalfield, this paper combines the methods of coalfield geology, sedimentology, petrology, tectonic geology, field observation and indoor analysis. Taking the law of coal accumulation as the main direction, the evolution process of coal-bearing basin and the distribution law of coal seam are summarized. The study area is located in the southwest margin of Ordos Basin, in the eastern section of Liupanshan, in two large inland coal-bearing basins, Huating coalfield and Ankou-Xinyao coalfield. The main coal-bearing rock series is the large thickness of the Yanan formation of the Middle Jurassic in the study area. Because of its wide distribution and large reserves, it is an ideal coal for industrial use because it belongs to low ash, low sulfur and middle and high volatile coal. The coal bearing strata of Yan'an formation in the study area can be divided into three sections and four cycles, which are located in the middle and upper part of the first stage of the first cycle. The coal seam occurrence characteristics, coal petrology and sedimentology are adopted. There are mainly alluvial fan facies, fluvial facies, lacustrine delta facies and lacustrine facies in the coal-bearing strata in the area. Peat swamps developed on the delta plain are the main coal accumulation environment. Because of the warm and humid climate, the luxuriant growth of a large number of coal-forming paleoplants, the influence of good paleogeographic environment and the comprehensive factors of paleotectonics, the extremely thick coal seams have been formed. Through the analysis of the coal controlling factors, the coal accumulation law of this coal seam has been summed up. This provides a good basis for mining and coal searching in the future.
【学位授予单位】：河北工程大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：P618.11
本文编号：2123677
[Abstract]:Based on the existing geological data and previous research results in Huating coalfield and Ankou-Xinyao coalfield, this paper combines the methods of coalfield geology, sedimentology, petrology, tectonic geology, field observation and indoor analysis. Taking the law of coal accumulation as the main direction, the evolution process of coal-bearing basin and the distribution law of coal seam are summarized. The study area is located in the southwest margin of Ordos Basin, in the eastern section of Liupanshan, in two large inland coal-bearing basins, Huating coalfield and Ankou-Xinyao coalfield. The main coal-bearing rock series is the large thickness of the Yanan formation of the Middle Jurassic in the study area. Because of its wide distribution and large reserves, it is an ideal coal for industrial use because it belongs to low ash, low sulfur and middle and high volatile coal. The coal bearing strata of Yan'an formation in the study area can be divided into three sections and four cycles, which are located in the middle and upper part of the first stage of the first cycle. The coal seam occurrence characteristics, coal petrology and sedimentology are adopted. There are mainly alluvial fan facies, fluvial facies, lacustrine delta facies and lacustrine facies in the coal-bearing strata in the area. Peat swamps developed on the delta plain are the main coal accumulation environment. Because of the warm and humid climate, the luxuriant growth of a large number of coal-forming paleoplants, the influence of good paleogeographic environment and the comprehensive factors of paleotectonics, the extremely thick coal seams have been formed. Through the analysis of the coal controlling factors, the coal accumulation law of this coal seam has been summed up. This provides a good basis for mining and coal searching in the future.
【学位授予单位】：河北工程大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：P618.11
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