【摘要】 为研究新疆阜康矿区煤的吸附孔分形特征,进行了低温氮吸附试验,采用BET模型和BJ H模型计算得到煤的孔隙比表面积及体积,应用FHH模型计算煤的孔隙分形维数,分析了分形维数与煤质参数及孔隙参数关系。试验结果表明:阜康矿区煤的孔隙A=D一3在研究尺度范围内分形特征明显,分形维数为2.25045~2.56277;煤的孔隙分形维数与水分呈负相关关系,与灰分呈正相关关系,与固定碳含量呈二次函数关系,与挥发分关系不明显;分形维数与孔隙直径为负相关关系,与孔隙比表面积、孔隙体积呈正相关关系;分形维数与中孔比表面积及体积占比呈负相关关系,与微孔和过渡孔体积占比呈正相关性,但与两者比表面积占比无明显关系。更多还原

【Abstract】 to study the fractal characteristics of coal adsorbed pore in Fukang mining district of Xinjiang,the experiments of adsorbed with nitrogen at low temperature were carried out,the coal pore specific surface area and volume were calculated by employing the BET and BJH model,the coal pore fractal dimension was calculated by adopting the FHH model,the relationships of fractal dimension and the parameters of coal quality and pore were analyzed.The experimental results show that the fractal characteristics of coal pore of Fukang mining district are very obvious within the scope of study,the fractal dimension is 2.25045 to 2.56277;the fractal dimension of coal pore is negatively correlated with moisture content and positively correlated with ash content,it exhibits an impact of quadratic relationship on the fixed carbon content,the relationship of fractal dimension and volatile matter is not obvious;the fractal dimension of coal pore is negatively correlated with pore diameter and positively correlated with pore specific surface area and volume;the fractal dimension of coal pore is negatively correlated with the mescopore ratios in pore specific surface area and volume and positively correlated with micropore and transition pore ratios in pore volume,however,the relationship of fractal dimension and micropore and transition pore ratios in pore specific surface area is not obvious.更多还原