本文選題：高瓦斯易自燃煤體 + 程序升溫��； 參考：《煤礦安全》2017年07期

【摘要】：為了探究高瓦斯易自燃煤體低溫氧化過程中煤體內(nèi)部裂隙發(fā)育演化過程,掌握低溫氧化對煤體裂隙發(fā)育的作用機(jī)理,通過核磁共振技術(shù)來檢測低溫氧化過程中煤體內(nèi)部孔隙孔徑和數(shù)量的演化規(guī)律,并使用氣相色譜和工業(yè)分析實(shí)驗(yàn)分析煤體裂隙發(fā)育過程。實(shí)驗(yàn)表明:隨著煤體氧化溫度的升高,煤體內(nèi)部孔隙的孔徑和數(shù)量均有增加,在200℃的升溫區(qū)間內(nèi)孔隙率上升了72.2%;氣相色譜和工業(yè)分析實(shí)驗(yàn)證明低溫氧化過程中煤體整個裂隙發(fā)育過程分2個階段進(jìn)行,在低溫氧化初期(30~130℃),由于煤體內(nèi)部水分流失、蒸發(fā),導(dǎo)致內(nèi)部微孔擴(kuò)張、連通成中孔,在低溫氧化后期(130~230℃),由于煤體內(nèi)部大分子和揮發(fā)分氧化分解,導(dǎo)致內(nèi)部中孔開始擴(kuò)張、連通成大孔和微裂隙。
[Abstract]:In order to probe into the evolution process of cracks in coal body during the process of low temperature oxidation of coal body with high gas content, the mechanism of action of low temperature oxidation on the development of fracture in coal body is grasped. Nuclear magnetic resonance (NMR) technique was used to detect the evolution of pore size and quantity in coal body during oxidation at low temperature, and gas chromatography and industrial analysis were used to analyze the process of fracture development of coal body. The experimental results show that with the increase of oxidation temperature of coal body, the pore size and quantity of pores in coal body increase. The porosity increased 72.2 in the temperature range of 200 鈩，

本文編號：1901055