Quantitative analysis and characterization of pore characteristics of Guizhou anthracite coal
The intricate geological structure of Guizhou,coupled with disasters like gas explosions has severely hampered the develop-ment of the coal industry in the region.To quantitatively analyze and characterize pore features of anthracite coal in Guizhou region,tak-ing the 5-2 coal seam of the Faer Coal Mine in Guizhou Province,which has representative characteristics of anthracite coal,using tech-niques such as low-temperature nitrogen adsorption and low-field nuclear magnetic resonance,a thorough analysis of the pore features of the coal bodies was conducted.At the same time,the fractal theory was used to compare and analyze the advantages and disadvantages of the low-temperature nitrogen adsorption and low-field nuclear magnetic resonance testing methods.The research result shows that Faer anthracite coal samples are primarily composed of slit and narrow-slit pores,with abundant micropores but poor connectivity to medium and large pores.By adopting appropriate coal body modification techniques,we can effectively enhance pore connectivity.In low-field nuclear magnetic resonance testing,this technology can effectively characterize the complexity and heterogeneity of large pores.While low-temperature nitrogen adsorption test is limited by certain methodological constraints,it can well characterize the complexity and het-erogeneity of micro pores.This study aims to provide theoretical references for the efficient and safe mining of anthracite coal resources in Guizhou region,contributing to the sustainable development of the coal industry in the region.
万方数据
维普
