突出煤孔隙特征的实验研究

发布时间：2018-03-16 07:12

  本文选题：突出煤　切入点：孔径分布　出处：《辽宁工程技术大学》2013年硕士论文　论文类型：学位论文

【摘要】：在对煤与瓦斯突出实际应用研究中，煤的瓦斯含量、瓦斯解吸速度、瓦斯涌出强度和衰减规律以及瓦斯资源评价和开发等均涉及煤的孔隙。孔隙结构的研究，将对解释煤吸附瓦斯的能力、探明煤与瓦斯突出机理有重要意义。对孔隙结构进行的深入研究，不仅能从微观上更科学的解释煤吸附瓦斯的能力，并且对于揭示煤与瓦斯突出机理的具有重要的理论意义。 本文通过对不同矿井不同煤样的工业分析，，实验研究不同煤样对瓦斯放散速度、坚固性系数、等温吸附解吸和低温氮吸附等特性，研究突出煤和非突出煤在孔隙特征上存在的差异，分析煤的不同孔隙特征对突出的影响。 通过实验研究，得出：突出煤的孔隙形态主要以一端封闭的孔和墨水瓶孔为主，非突出煤主要以开放型孔为主；突出煤的内比表面积明显高于非突出煤；突出煤中过渡孔的体积百分比大于非突出煤，突出煤发生突出后一部分微孔孔径变大成为过渡孔；但是突出煤和非突出煤在孔径分布上无明显差异。
[Abstract]:In the practical application research of coal and gas outburst, coal gas content, gas desorption speed, gas emission intensity and attenuation law, gas resource evaluation and development are all related to the study of pore structure of coal. It will be of great significance to explain the ability of coal to adsorb gas and to find out the mechanism of coal and gas outburst. The deep study of pore structure can not only explain the ability of coal to adsorb gas more scientifically, but also explain the mechanism of coal and gas outburst. It is of great theoretical significance to reveal the mechanism of coal and gas outburst. Based on the industrial analysis of different coal samples in different coal mines, the characteristics of different coal samples such as gas release rate, coefficient of solidity, isothermal adsorption and desorption and low temperature nitrogen adsorption are studied experimentally in this paper. The difference of pore characteristics between outburst coal and non-outburst coal is studied, and the influence of different pore characteristics on outburst is analyzed. Through experimental study, it is concluded that the pore morphology of outburst coal is mainly composed of closed hole at one end and ink bottle hole, while that of non-outburst coal is mainly open pore, and the internal specific surface area of outburst coal is obviously higher than that of non-outburst coal. The volume percentage of transition pore in outburst coal is larger than that of non-outburst coal, and a part of micropore aperture becomes transition pore after outburst, but there is no obvious difference in pore size distribution between outburst coal and non-outburst coal.
【学位授予单位】：辽宁工程技术大学
【学位级别】：硕士
【学位授予年份】：2013
【分类号】：TD713.1

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