软煤体孔隙结构及其分形特征研究

发布时间：2018-05-09 20:34

本文选题：软煤体 + 扫描电镜　；参考：《矿业安全与环保》2015年06期

【摘要】：为了研究软煤体孔隙结构特征及其对煤体瓦斯赋存、流动特性的影响规律,基于分形理论,采用扫描电镜、低温氮吸附实验等方法,分析澄合矿区典型软煤体的微观孔裂隙结构及连通情况等,运用盒维数算法测算煤样微结构分形维数及分布情况。研究结果表明:澄合矿区软煤体孔隙、裂隙比较发育,孔洞与裂隙之间的连通性较好,软煤体孔隙形态复杂,较高的孔容值使软煤体具有较大的瓦斯吸附空间,一端几乎封闭的不透气性孔及细颈瓶状孔等孔型有利于瓦斯的吸附聚积,不利于瓦斯的扩散运移。研究结果可为深入研究软煤体微结构性质及软煤体中瓦斯运移规律提供理论依据。
[Abstract]:In order to study the pore structure characteristics of soft coal and its influence on the gas occurrence and flow characteristics of soft coal, based on fractal theory, scanning electron microscope (SEM) and nitrogen adsorption experiments at low temperature were used. The microstructure and connectivity of typical soft coal bodies in Chenghe mining area are analyzed. The fractal dimension and distribution of coal samples are calculated by box dimension algorithm. The results show that the pores of soft coal in Chenghe mining area are relatively developed, and the connectivity between pores and fractures is better, the pore shape of soft coal is complex, and the higher pore volume value makes the soft coal has a larger gas adsorption space. The closed pores at one end and the fine neck bottle holes are favorable to the gas adsorption and accumulation, and are not conducive to the diffusion and migration of gas. The results can provide a theoretical basis for the further study of the microstructure of soft coal and the law of gas migration in soft coal.
【作者单位】：西安科技大学能源学院;陕西陕煤澄合矿业有限公司;
【分类号】：TD712

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