Study on Pore Structure and Fractal Characteristics of Soft Coal
XU Mangui
MENG Ran
WEI Pan
HAN Jinzi
ZHANG Bifeng
Abstract：In this paper, analysis was carried out on the fissure structure of micro pores and their conductivity in the soft coal based on the fractal theory, by using the scanning electron microscope and through low-temperature nitrogen adsorption experiments in order to study the pore structure characteristics in the soft coal and its influence law on the gas occurrence and migration features in Chenghe Coal Mining Area, and the fractal dimensions and distribution of the microstructure of coal samples were calculated by using of the boxing counting. The results showed that in Chenghe Coal Mining Area, the pores and fissures in the soft coal relatively developed, there was a better conductivity between pores and fissures, the pores' shape in the soft coal was complicated, the higher pore volume value made the soft coal have a larger gas adsorption space, the airtight pores with one end closed and the thin-neck bottle-shape pores were advantageous to gas adsorption and accumulation, but they were not advantageous to the gas diffusion and migration. The research results can provide theoretical basis for further studying the microstructural properties of the soft coal and the gas migration law in the soft coal.
Keywords：soft coalscanning electron microscopelow-temperature nitrogen adsorptionpore structurefractal characteristics
Publication Date：2015-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：5( 22-26 )