高瓦斯易自燃煤体低温氧化过程中裂隙发育规律

发布时间：2018-05-17 10:40

  本文选题：高瓦斯易自燃煤体 + 程序升温　； 参考：《煤矿安全》2017年07期

【摘要】：为了探究高瓦斯易自燃煤体低温氧化过程中煤体内部裂隙发育演化过程,掌握低温氧化对煤体裂隙发育的作用机理,通过核磁共振技术来检测低温氧化过程中煤体内部孔隙孔径和数量的演化规律,并使用气相色谱和工业分析实验分析煤体裂隙发育过程。实验表明:随着煤体氧化温度的升高,煤体内部孔隙的孔径和数量均有增加,在200℃的升温区间内孔隙率上升了72.2%;气相色谱和工业分析实验证明低温氧化过程中煤体整个裂隙发育过程分2个阶段进行,在低温氧化初期(30~130℃),由于煤体内部水分流失、蒸发,导致内部微孔扩张、连通成中孔,在低温氧化后期(130~230℃),由于煤体内部大分子和挥发分氧化分解,导致内部中孔开始扩张、连通成大孔和微裂隙。
[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，

本文编号：1901055