本文選題：煤層柱狀 + 煤相��； 參考：《中國(guó)礦業(yè)大學(xué)》2015年碩士論文

【摘要】：采集山西古交礦區(qū)西曲井田2號(hào)、4號(hào)、9號(hào)煤層柱狀樣,分析了煤相對(duì)煤吸附-解吸性的控制特征。采用Q型聚類分析,參考GI-TPI圖解,識(shí)別出5種煤相類型。煤相呈旋回式和跳躍式演化,顯示泥炭沼澤覆水條件具有脈動(dòng)式的變化特征。采用Langmuir模型和D-A模型擬合吸附數(shù)據(jù),討論了不同煤相煤吸附甲烷特性的異同。采用Langmuir模型和Weibull模型擬合解吸數(shù)據(jù),討論了不同煤相煤對(duì)甲烷的解吸特性。研究認(rèn)為:起源于草本植物的煤比木本植物的煤對(duì)甲烷的吸附能力更強(qiáng),原始結(jié)構(gòu)孔隙保存好的顯微組分對(duì)甲烷的吸附和解吸都有利。研究發(fā)現(xiàn):障壁島-瀉湖低位沼澤相(A)吸附能力最弱,解吸能力較強(qiáng),解吸率中等;障壁島-瀉湖森林沼澤相(B)吸附、解吸能力均較強(qiáng),解吸率最高;下三角洲平原低位沼澤相(C)吸附能力強(qiáng),解吸能力較差,解吸率最低;上三角洲平原潮濕森林沼澤相(D)吸附、解吸能力都較強(qiáng),解吸率較高;上三角洲平原干燥森林沼澤相(E)吸附能力很差,解吸能力較弱,解吸率較低。結(jié)合成煤植物類型、孔隙結(jié)構(gòu)、灰分產(chǎn)率等參數(shù),進(jìn)一步討論了造成煤相上述吸附-解吸性差異的地質(zhì)原因。最終認(rèn)為,2號(hào)煤層的第2-Ⅳ階段和9號(hào)煤層產(chǎn)氣條件有利,4號(hào)煤層的煤層氣開(kāi)采條件差。
[Abstract]:The columnar samples of coal seams No. 2, No. 4 and No. 9 in Xiqu Mine Field of Gujiao Mining area, Shanxi Province, were collected, and the control characteristics of coal relative to coal adsorption and desorption were analyzed. Five types of coal facies were identified by using Q cluster analysis and GI-TPI diagram. The evolution of coal facies is cyclic and leaping, which shows that the conditions of peat swamp have pulsating variation. The adsorption data were fitted by Langmuir model and D-A model, and the similarities and differences of methane adsorption characteristics of different coal phases were discussed. Langmuir model and Weibull model were used to fit the desorption data, and the desorption characteristics of methane from different coal phases were discussed. The results show that the methane adsorption ability of the coal originated from herbaceous plants is stronger than that of woody coal, and that the microscopic components preserved in the original pore structure are beneficial to the adsorption and desorption of methane. The results show that the adsorption ability of barrier island-lagoon low marsh phase A) is the weakest, the desorption capacity is relatively strong, and the desorption rate is medium, the barrier island-lagoon forest marsh phase has the highest desorption capacity and the highest desorption rate. The lower delta plain has strong adsorption ability, poor desorption ability and the lowest desorption rate, and the upper delta plain has higher desorption capacity and higher desorption rate. In the upper delta plain, the adsorption ability of dry forest and marsh phase E) is very poor, the desorption ability is weak, and the desorption rate is low. Combined with the parameters of coal-forming plant type, pore structure and ash yield, the geological reasons for the difference of adsorption-desorption properties of coal facies are discussed. Finally, it is concluded that the gas production conditions of No. 2 coal seam and No. 9 coal seam are favorable, and the coal bed methane mining conditions of No. 4 coal seam are poor.
【學(xué)位授予單位】：中國(guó)礦業(yè)大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：P618.1

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