本文選題：軟硬煤　切入點：微結構　出處：《煤礦安全》2017年12期 　論文類型：期刊論文

【摘要】：為研究不同軟硬煤的微結構差異性特征,以山西潞安王莊煤礦為工程背景,針對6種不同軟硬煤樣,采用電鏡掃描(SEM)分析了表面形貌特性,并結合低溫液氮吸附法研究了軟硬煤的孔隙結構特征,對不同變質變形程度煤樣的微結構差異性進行了對比分析。研究結果表明:構造變形對軟煤的表面結構有顯著影響,軟煤較對應的硬煤表面更粗糙,擁有更復雜的表面孔隙結構;煤化作用對孔隙結構具有差異顯著,煤的孔徑隨變質程度的增加而逐步變小;孔總比表面積隨煤化程度的加深而變大,所有煤樣微孔比表面積所占比例均超過了60%,比表面積主要由微孔貢獻;軟煤的平均孔徑始終小于對應的硬煤,而孔比表面積始終大于相應的硬煤;構造變形使得煤體結構變得更復雜,構造軟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.
【作者單位】： 山西壽陽段王煤業(yè)集團有限公司;
【分類號】：TD821

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1 張加琪;煤結構對軟硬煤瓦斯放散規(guī)律差異性的影響[D];河南理工大學;2016年

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本文編號：1641101