煤矿安全2017，Vol.48Issue(2)：21-25,5.DOI:10.13347/j.cnki.mkaq.2017.02.006
低透气性煤孔隙结构研究
Research on Pore Structure of Coal with Low Permeability
摘要
Abstract
In order to study the pore structure characteristics of low permeability coal,we carry out experiments on M9 anthracite soft seam of Guiqing Coal Mine by low temperature nitrogen adsorption method and mercury intrusion method.The results show that the pore size distribution of coal is extensive and develops from micropores to visible holes and cracks.The micropore which is in favor of gas storage with the most distributed development and has the largest surface area,which accounts for more than 98％ of total surface area.However,large pores,medium pores and fractures,which form infiltrated volume,are less development.The adsorption-desorption curve and the advance and retreat mercury curve of coal are both not overlap.Both the desorption curve and the retreat mercury curve have inflection point.And the efficiency of retreat mercury is low.All of these show that impermeable pores and neck bottle type holes closed at one end in coal,which could lead to poor permeability,be not conducive to the gas diffusion and seepage,and reduce the extraction efficiency,be prone to coal and gas outburst.关键词
低温氮吸附法/压汞法/滞后环/孔隙结构/透气性Key words
low temperature nitrogen adsorption method/mercury intrusion method/hysteresis loop/pore structure/permeability分类
矿业与冶金引用本文复制引用
顾熠凡,王兆丰,戚灵灵..低透气性煤孔隙结构研究[J].煤矿安全,2017,48(2):21-25,5.基金项目
河南省高校基本科研业务费专项资金资助项目(NSFRF140105) （NSFRF140105）
2015年度河南省教育厅高等学校重点科研资助项目(15A440007) （15A440007）
2014年地方高校国家级大学生创新创业训练计划资助项目(201410460036) （201410460036）
