摘要
基于9个煤样的常规压汞测试,绘制了各个煤样In(dSPr/dPr)和lnPr的散点图。在此基础上,结合分形理论,根据散点图在各个阶段的不同趋势特征,定量划分了煤中的微小孔,过渡孔和大孔。研究结果表明,半径小于75.6nm的孔为微小孔,半径为75.6~512.8nm的孔为过渡孔,半径大于512.8nm的孔为大孔。三类孔的孔容百分比数据表明孔隙系统主要由微小孔组成,其孔容百分比一般高于70%;Y3,Y4,Y5和Y6的过渡孔和大孔的孔容百分比约为30%,其渗流能力最强。
Based on the conventional mercury injection test of nine coal samples, the In (dSPr/dPr) and lnPr scatter plots of each coal samples were drawn in the paper. Based on the circumstances, in combination with the fractal theory, according to the different tendency features of the each stage in the scatter plots, the micro pore, transition pore and macro pore in the coal were quantitatively divided. The study results showed that the pore with a radius less than 75. 6nm would be the micro pore, the pore with a radius of 75. 6 - 512. 8 nm would be a transition pore and the pore with a radius over 512. 8nm would be a macro pore. The percentage data of the three pore volumes showed that the pore system was mainly consisted with the micro pores and the percentage of the pore volume would be 70% higher than others. The pore volume percentages of the Y3, Y4, Y5 and Y6 transition pores and macro pores would be about 30% and the vadose capacity was the best.
出处
《煤炭工程》
北大核心
2013年第10期112-114,共3页
Coal Engineering
基金
国家科技重大专项(2011ZX05034-005)
国家自然科学基金(41202236)
关键词
压汞实验
孔比表面积增量
孔隙分类
分形理论
mercury injection experiment
specific surface area increment of pore
classification of pore
fractal theory