郑庄井田3号煤孔隙结构特征

Pore Structure Characteristics of the No.3 Coal Seam in Zhengzhuang Wellfield

为掌握郑庄井田3号煤层孔隙结构特征,采用低温液氮吸附静态容量法对煤层孔隙结构进行实验研究。结果表明:煤层孔隙形态结构相对复杂,煤中孔隙以一端开口的筒状孔和“墨水瓶”状孔为主,并发育少量四面开口平行板状、两端开口状孔隙;孔隙尺度大小以微孔和过渡孔为主,中孔发育少量,大孔发育甚微;微孔、过渡孔的比表面积占比高且为主要贡献者;过渡孔的孔容占比最高,微孔、中孔孔容占比次之且二者基本相当,大孔孔容占比最小。

In order to grasp the pore structure characteristics of the No.3 coal seam in the Zhengzhuang wellfield,the low temperature liquid nitrogen adsorption static capacity method is used to conduct experimental research on the pore structure of the coal seam.The results show that the pore morphology and structure of the coal seam are relatively complex.The pores in coal are mainly cylindrical pores and"ink bottle"shaped pores with one end open,and a small number of parallel plate with four openings shaped and two end open shaped pores are developed;The pore size is mainly composed of micropores and transitional pores,with a small amount of mesopores developed and very little development of macropores;The proportion of specific surface area of micropores and transition pores is high and they are the main contributors;The proportion of pore volume in transition pores is the highest,followed by the proportion of micropores and mesopores,and the two are basically equivalent,while the proportion of macropores is the smallest.