本文選題：軟硬煤　切入點(diǎn)：微結(jié)構(gòu)　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(jié)構(gòu)差異性特征,以山西潞安王莊煤礦為工程背景,針對(duì)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(jié)合低溫液氮吸附法研究了軟硬煤的孔隙結(jié)構(gòu)特征,對(duì)不同變質(zhì)變形程度煤樣的微結(jié)構(gòu)差異性進(jìn)行了對(duì)比分析。研究結(jié)果表明:構(gòu)造變形對(duì)軟煤的表面結(jié)構(gòu)有顯著影響,軟煤較對(duì)應(yīng)的硬煤表面更粗糙,擁有更復(fù)雜的表面孔隙結(jié)構(gòu);煤化作用對(duì)孔隙結(jié)構(gòu)具有差異顯著,煤的孔徑隨變質(zhì)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(guò)了60%,比表面積主要由微孔貢獻(xiàn);軟煤的平均孔徑始終小于對(duì)應(yīng)的硬煤,而孔比表面積始終大于相應(yīng)的硬煤;構(gòu)造變形使得煤體結(jié)構(gòu)變得更復(fù)雜,構(gòu)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(yáng)段王煤業(yè)集團(tuán)有限公司;
【分類號(hào)】：TD821

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本文編號(hào)：1641101