不同软硬煤的结构差异性研究

发布时间：2018-03-20 22:38

本文选题：软硬煤　切入点：微结构　出处：《煤矿安全》2017年12期 　论文类型：期刊论文

【摘要】：为研究不同软硬煤的微结构差异性特征,以山西潞安王庄煤矿为工程背景,针对6种不同软硬煤样,采用电镜扫描(SEM)分析了表面形貌特性,并结合低温液氮吸附法研究了软硬煤的孔隙结构特征,对不同变质变形程度煤样的微结构差异性进行了对比分析。研究结果表明:构造变形对软煤的表面结构有显著影响,软煤较对应的硬煤表面更粗糙,拥有更复杂的表面孔隙结构;煤化作用对孔隙结构具有差异显著,煤的孔径随变质程度的增加而逐步变小;孔总比表面积随煤化程度的加深而变大,所有煤样微孔比表面积所占比例均超过了60%,比表面积主要由微孔贡献;软煤的平均孔径始终小于对应的硬煤,而孔比表面积始终大于相应的硬煤;构造变形使得煤体结构变得更复杂,构造软煤具有超前演化特征。
[Abstract]:In order to study the differences of microstructure of different soft and hard coals, taking Wangzhuang Coal Mine, Lu'an, Shanxi Province as the engineering background, the surface morphology characteristics of six different soft and hard coal samples were analyzed by scanning electron microscope (SEM). The pore structure characteristics of soft and hard coal were studied by low temperature liquid nitrogen adsorption method. The differences of microstructure of coal samples with different metamorphism degrees were compared and analyzed. The results show that structural deformation has a significant effect on the surface structure of soft coal. Soft coal has more rough surface and more complex surface pore structure than the corresponding hard coal, the coalification has significant difference on pore structure, and the pore size of coal becomes smaller with the increase of metamorphic degree. The total specific surface area of pores increases with the deepening of coalification. The proportion of specific surface area of micropores in all coal samples exceeds 60. The specific surface area is mainly contributed by micropores, and the average pore size of soft coal is always smaller than that of corresponding hard coal. The pore specific surface area is always larger than the corresponding hard coal, and the structural deformation makes the coal structure more complex, and the structural soft coal has the characteristics of advanced evolution.
【作者单位】：山西寿阳段王煤业集团有限公司;
【分类号】：TD821

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