本文選題：煤層氣 + 吸附　； 參考：《太原科技大學(xué)》2015年碩士論文

【摘要】：隨著我國(guó)煤層開(kāi)采深度的增加,煤層溫度變化明顯,溫度對(duì)煤層瓦斯賦存的影響不容忽視,研究溫度與煤層瓦斯解吸的關(guān)系對(duì)煤層瓦斯的抽采具有重要意義。目前,煤層瓦斯含量測(cè)定中很少將溫度作為影響煤體瓦斯含量的重要指標(biāo)。本文采用理論分析、實(shí)驗(yàn)測(cè)量、現(xiàn)場(chǎng)測(cè)試的研究方法,對(duì)不同溫度環(huán)境下煤體瓦斯的解吸量進(jìn)行了研究,得出了受溫度影響的瓦斯含量計(jì)算方程,在對(duì)實(shí)驗(yàn)礦區(qū)煤樣的測(cè)定中,確定了受溫度影響的瓦斯吸附解吸方程的吸附常數(shù)。進(jìn)行現(xiàn)場(chǎng)工業(yè)試驗(yàn),提出了具有針對(duì)性的瓦斯抽采方案,瓦斯抽采率提高了5%。本文研究結(jié)論如下:(1)通過(guò)對(duì)煤體瓦斯吸附與解吸的特性理論研究分析,得出煤體瓦斯在不同溫度環(huán)境下,吸附常數(shù)b值與溫度有關(guān),吸附常數(shù)a值與煤體的比表面積有關(guān)。進(jìn)一步研究發(fā)現(xiàn)溫度對(duì)a值的影響符合指數(shù)函數(shù)關(guān)系,考慮瓦斯不同的賦存條件引入?yún)?shù)?。結(jié)合氣體狀態(tài)方程與朗格繆爾方程,得出與受溫度變化影響的煤層瓦斯含量方程。(2)實(shí)驗(yàn)選取李雅莊礦2#煤作為煤樣,應(yīng)用WY98-A型瓦斯吸附解吸儀器,分別采用不同溫度(20℃—45℃)、不同壓力的兩種CH4注氣方式進(jìn)行吸附實(shí)驗(yàn)測(cè)定,研究得出:朗格繆爾吸附常數(shù)a值與溫度的函數(shù)關(guān)系以及b值與溫度的函數(shù)關(guān)系,由此確定出參數(shù)α值的大小,完善了理論中關(guān)于溫度變化下的煤層瓦斯含量方程。(3)通過(guò)對(duì)李雅莊礦煤層溫度進(jìn)行測(cè)量,得到溫度與煤層深度之間的函數(shù)關(guān)系式,針對(duì)2602回采工作面煤層瓦斯含量的計(jì)算,比較了溫度對(duì)煤層瓦斯含量的影響結(jié)果,分析了以往瓦斯抽采效果不理想的原因。結(jié)合2602回采工作面煤體瓦斯含量的來(lái)源分析后,采取了在本煤層和鄰近層瓦斯抽采技術(shù)與頂板鉆孔和高位鉆場(chǎng)底板高位裂隙鉆孔的瓦斯聯(lián)合抽采方式,并確定出預(yù)計(jì)抽采時(shí)間。經(jīng)過(guò)現(xiàn)場(chǎng)工業(yè)試驗(yàn),歷時(shí)14個(gè)月的抽采效果檢驗(yàn),煤層瓦斯的抽采量達(dá)到45%以上,基本保障了煤層開(kāi)采的安全性與可靠性。為煤層瓦斯在抽采設(shè)計(jì)與利用溫度對(duì)煤層瓦斯含量的判斷提了理論和實(shí)踐保障。
[Abstract]:With the increase of coal seam mining depth in China, the change of coal seam temperature is obvious, and the influence of temperature on the occurrence of coal seam gas can not be ignored. It is of great significance to study the relationship between temperature and coal seam gas desorption. At present, the temperature is seldom regarded as the important index to influence the coal gas content in the coal seam gas content measurement. In this paper, theoretical analysis, experimental measurement and field test are used to study the desorption amount of coal gas under different temperature conditions, and the calculation equation of gas content affected by temperature is obtained, which is used in the determination of coal sample in experimental mining area. The adsorption constants of gas adsorption and desorption equation affected by temperature were determined. The field industrial test was carried out, and the specific gas drainage scheme was put forward, and the gas drainage rate was increased by 5%. The conclusion of this paper is as follows: (1) through the theoretical study and analysis of the adsorption and desorption characteristics of coal gas, it is concluded that the adsorption constant b is related to temperature and the adsorption constant a is related to the specific surface area of coal under different temperature conditions. It is found that the effect of temperature on a value is in accordance with the exponential function relationship, and the parameters are introduced into consideration of different gas occurrence conditions. Combined with the gas state equation and Langmuir equation, the gas content equation of coal seam affected by temperature change was obtained. The coal of Liyazhuang Mine was selected as coal sample in the experiment, and WY98-A gas adsorption and desorption instrument was used. The adsorption experiments were carried out by two different gas injection modes of Ch _ 4 at different temperatures (20 鈩，

本文編號(hào)：1993154