Differences in of Pore Structure of Coals and Their Impact on the Permeability of Coals from the Zhu-Zang Syncline, Guizhou Province

详细信息   

• 责任者：Chang Huizhen (Key Laboratory of Coalbed Methane Resources and Reservoir Formation Process ; CUMT ; Ministry of Education ; School of Resource and Earth Science ; China University of Mining and Technology ; Xuzhou 221008 ; China) ; Qin Yong
• 刊名：Geological Journal of China Universities
• 出版年：2012
• 卷期：18(3)
• 关键词：煤 ; coal ; 孔隙结构 ; pore structure ; 渗透性 ; permeability ; 贵州 ; Guizhou Province
• 页码：p.544-548
• 图表：2 illus., 4 tables, 5 refs.
• 分类号：1004
• issnNo：ISSN1006-7493
• isbnNo：CN32-1440/P

摘要

    

By use of mercury intrusion, low nitrogen adsorption and scanning electron microscopy, the pore structure and seepage ability of three samples from the major coal seam in the Zhu-Zang syncline of the Zhina coalfield were analyzed. Data show that pore in the samples is dominated by transitional pore, macro- and micro-pores account for a large proportions, with minor mesopore. Pore specific surface area come mainly from the transitional pore and micropore. Pore with large diameter is open and pore with small diameter is semi-open. Difference of the pores and fractures among three samples may be the reason from which the air permeability of the Qinshan sample is higher than that of the Hongyanjiao sample.