贵州典型矿区突出煤孔隙结构及其吸附特性实验研究  

Experimental study on pore structures of outburst coal and its adsorption properties at typical mining fields in Guizhou Province

作　　者：李希建[1,2] 林柏泉[1] 施天虎[3] 

机构地区：[1]中国矿业大学安全工程学院,江苏徐州221116 [2]贵州大学矿业学院,贵州贵阳550025 [3]四川省煤田地质工程勘察设计研究院,四川成都610072

出　　处：《采矿与安全工程学报》2013年第3期415-420,共6页Journal of Mining & Safety Engineering

基　　金：国家重点基础研究发展计划(973)项目(2011CB201205);国家"十二五"科技支撑计划项目(2012BAK04B07);贵州省科技厅工业攻关项目(黔科合GY字(2011)3012号);贵州省科技厅国际合作项目(黔科合外G字(2009)700111号)

摘　　要：为了完善贵州区内突出煤的孔隙结构和吸附特性等物理特性,基于煤的孔隙结构和吸附特性对于瓦斯（煤层气）抽采与防治煤与瓦斯突出的重要性,采用相关仪器测定了贵州突出煤的孔隙结构和吸附特性,并分析了实验结果。结果表明：突出煤样平行层理表面均存在一定数量的晶体物质和微孔;突出煤样垂直节理表面可见一道或几道平行或交叉的且大小不一的裂隙;突出煤样的孔隙或裂隙孔径大部分在0~10 nm之间,孔径为3~5 nm的微孔在煤样中最为丰富,为瓦斯（煤层气）主要吸附空间;当相对压力达到0.8左右时,瓦斯吸附量会急剧上升;突出煤样瓦斯吸附量存在较大差异,孔容大的吸附量大。In order to improve the understandings of pore structures and adsorption properties of out- burst coal mined at typical mining fields in Guizhou Province, such structures and properties are tested by using related apparatuses based on their importance on the extraction of coal gas （coalbed methane） and the prevention coal and gas outburst of happening. Results show that a number of crystal materials and micropores exist on the surface of coal samples＇ parallel beddings; one or several fractures in paral- lel or intersected with different sizes can be observed on the surface of samples＇ vertical joints. The dis- tribution of diameters of sample＇s pores or fractures is mostly from 0 to 10 nm, and micropores with a diameter of 3 nm to 5 nm are the most abundant in coal samples, which are also the main spaces to ad- sorb the coal gas. When the relative pressure reaches about 0.8, the gas adsorption volume would increase greatly. The gas adsorption volumes change for different samples, generally, the bigger pore volume has more adsorption volume.

关 键 词：突出煤 孔隙结构 吸附特性 吸附-解吸等温线 实验研究 

分 类 号：TD712[矿业工程—矿井通风与安全]