可溶有机质对肥煤孔隙结构及力学性质的影响  

Effect of soluble organic matter on pore structure and mechanical properties of fat coal

作　　者：陈立 翟韫哲 陈晓琳 Chen Li;Zhai Yunzhe;Chen Xiaolin(College of Mining and Surveying Engineering,Hebei University of Engineering,Handan 056038,China)

机构地区：[1]河北工程大学矿业与测绘工程学院,河北邯郸056038

出　　处：《煤炭与化工》2022年第1期109-111,共3页Coal and Chemical Industry

基　　金：2019年河北省高等学校科学技术研究项目(QN2020404);2020年河北省自然科学基金生态智慧矿山联合基金项目(E2020402036)。

摘　　要：为了研究煤中可溶有机质对煤的孔隙结构及力学性质的影响,选取肥煤制成实验煤样,采用乙酸乙酯作为萃取溶剂,利用比表面积及孔径分析仪和伺服压力机探究萃取前后煤样的孔隙、孔径分布及力学参数的变化规律。研究表明,经过30 h的萃取后,实验煤样质量减小了3.0%;萃取后煤样的平均孔径及孔体积均增加,比表面积减少,可溶有机质主要集中分布在1.5~5.3 nm;萃取后的型煤试件抗压能力相较原煤提高了53%。In order to study the effect of soluble organic matter in coal on the pore structure and mechanical properties of coal,the experimental coal samples were prepared from fat coal,and ethyl acetate was used as extraction solvent.The specific surface area and pore size analyzer and servo press were used to explore the changes of pore size distribution and mechanical parameters of coal samples before and after extraction.The research shows that after 30 h of extraction,the mass of experimental coal sample decreases by 3.0%.After extraction,the average pore size and pore volume of coal samples increased,the specific surface area decreased,and the soluble organic matter mainly distributed in 1.5~5.3 nm.Compared with raw coal,the compressive strength of briquette samples after extraction was increased by 53%.

关 键 词：可溶性有机质 乙酸乙酯 孔隙 力学性质 

分 类 号：TD75[矿业工程—矿井通风与安全]