Pore characteristics of the main coal seams in Bide-Santang Basin in Western Guizhou Province
Abstract：Through a series of relevant experiments of coal samples in main coal seams of study area, analyzed the vari- ation of the pore characteristics and porosity characterization parameters, discussed the geological factors which control pore characteristics. The results show that the pore can be divided into four big types in main coal seams of Bide-Santang basin. Porosity is range from 4.06% to 10. 12%. Micropore and minipore takes the dominant position, and provides more than 80% of the total pore volume. The mercury withdrawal efficiency is high. Pore forms are main- ly open, contains a number of semi-closed pore. Pore surface area is 18-21 m2/g,micropore occupies the highest pro- portion. Pore tortuosity has significant impact on threshold pressure. Median pore diameter of volume are mostly around 10 nm, the average of median pore diameter of area is 4.58 nm. Porosity and pore volume show "U" shape tendency with the increase of coal rank, with R = 2.0% as the cut-off point. The content of vitrinite is more than 70% in general control the amount of micropore and minipore. While the increase of minerals' content has negative impact on the development of pore system.
Keywords：Bide-Santang Basinmain coal seamspore characteristicmercury injection
Publication Date：2012-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：7( 1878-1884 )