Study on pore structure characteristics and capillary force curve model of long flame coal in Jinfeng Cuncaota mine
NING Jiangqi
TANG Mingyun
LUO Dayong
Abstract：In order to clarify the pore structure characteristics of long-flame coal and its adaptability to capil-lary force model,this paper takes the long-flame coal of Jinfeng Cuncaota Coal Mine in Inner Mongolia as the research object,and studies the pore structure characteristics of pore structure pore size distribution,pore vol-ume and pore morphology of coal samples through mercury intrusion experiment.On this basis,the adapt-ability of five capillary force models to long-flame coal is analyzed and evaluated.The results show that the pore size distribution of coal samples can be expressed as microcracks(＞72 445.3 nm),seepage pores(100～72 445.3 nm)and diffusion pores(5.5～100 nm).The pore volume is 0.006 5 mL/g,0.155 8 mL/g and 0.04 mL/g,respectively.The pore structure has the characteristics of ink bottle,and the pore connectivity is poor.Through the adaptability analysis of the capillary force model,Chenke model I can fit the experimental data well,and the fitting degree is as high as 97%,which can be used as a reference for the capillary force curve model of Inner Mongolia long flame coal.
Keywords：long flame coalmercury intrusion methodpore structurecapillary force modeladaptability evaluation
Publication Date：2025-04-30
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：6( 49-54 )