构造煤的孔隙结构实验研究  

Experimental Study on Pore Structure of Tectonic Coal

作　　者：周俊义[1] 赵宇[2] 于弘奕 

机构地区：[1]河南理工大学安全科学与工程学院,河南焦作454003 [2]河南理工大学土木工程学院,河南焦作454003

出　　处：《煤矿安全》2016年第7期5-8,13,共5页Safety in Coal Mines

基　　金：河南省高等学校重点科研资助项目(15A440013);国家科技重大专项资助项目(2011ZX05040-005)

摘　　要：通过对不同煤体结构的低温氮吸附实验发现,各孔径段的孔容比与比表面积比是不对应的,特别是微孔的孔容较小,但是比表面积较大。与原生结构煤相比,共生构造煤在各阶段孔容和比表面积都有所增加。煤储层孔隙是瓦斯的主要聚集场所,而且也是其运移通道;孔隙结构不仅制约着煤体的瓦斯含量,而且对解吸和扩散也有重要影响。Through low temperature nitrogen absorption test of different coal structure,we found that pore volume of each aperture segment does not correspond with the specific surface area ratio,in particular,pore volume of micro-pore is small,but it has larger specific surface area. Compared with the native structure of coal,symbiotic structure coal increased the specific surface area and pore volume at various stages. Coal reservoir porosity is the main gathering place for gas,but also its migration path; pore structure not only restricts the gas content of coal,but also has an important impact on the desorption and diffusion.

关 键 词：构造煤 孔隙结构 比表面积 孔容 瓦斯特性 

分 类 号：TD712[矿业工程—矿井通风与安全]