【摘要】：本文以華亭煤田和安口—新窯煤田現(xiàn)有的地質(zhì)資料和前人研究成果為基礎(chǔ),綜合煤田地質(zhì)學(xué)、沉積學(xué)、巖石學(xué)、構(gòu)造地質(zhì)學(xué)等研究方法,野外觀察和室內(nèi)分析相結(jié)合,以聚煤規(guī)律為主要方向,總結(jié)出含煤盆地演化過程及煤層的展布規(guī)律。研究區(qū)處于鄂爾多斯盆地的西南邊緣,六盤山東部地段,華亭煤田和安口—新窯煤田兩個(gè)大型內(nèi)陸型含煤盆地內(nèi),主要的含煤巖系是中侏羅統(tǒng)延安組,5#煤在研究區(qū)內(nèi)厚度大、分布廣、資源儲(chǔ)量大,是主要開采煤層,5#煤屬于低灰、低硫、中高揮發(fā)分煤,是理想的工業(yè)用煤。研究區(qū)內(nèi)延安組含煤地層可以分為三段四個(gè)旋回,5#煤層位于第一段第Ⅰ旋回的中上部,采用煤層賦存特征、煤巖學(xué)特征和沉積學(xué)等研究手段,區(qū)內(nèi)含煤地層主要發(fā)育有沖積扇相沉積、河流相沉積、湖泊三角洲相沉積和湖泊相沉積,其中發(fā)育在三角洲平原上的泥炭沼澤是5#煤的主要聚煤環(huán)境,在逐漸演變沉積成煤時(shí),因?yàn)闇嘏睗竦臍夂颦h(huán)境、大量成煤的古植物繁茂生長、良好的古地理環(huán)境和古構(gòu)造的綜合因素影響,形成了巨厚的5#煤層,通過對(duì)控煤因素分析總結(jié)出該煤層的聚煤規(guī)律,這對(duì)今后的開采、找煤工作提供了良好的依據(jù)。
[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.
【學(xué)位授予單位】：河北工程大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：P618.11

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