煤矿安全2024，Vol.55Issue(10)：28-37,10.DOI:10.13347/j.cnki.mkaq.20241130
基于CT图像的煤吸附甲烷细观变形分形特性研究
Study on microscopic deformation fractal characteristics of methane adsorbed by coal based on CT images
摘要
Abstract
In order to quantify the anisotropic characteristics of mesoscopic deformation during the process of coal adsorbing meth-ane,the CT scanning experiment of adsorption deformation was conducted during the methane adsorption process of anthracite coal under constant temperature using the ACTIS-CT scanning experimental system,the strain deformation of meso-structure of coal was quantitatively calculated during the adsorption process based on the particle tracking strain calculation algorithm of CT image,and the change regulation was discussed.On this basis,a quantitative research method for the heterogeneity of micro deformation of coal adsorbing methane based on CT technology was proposed,and the fractal dimension D was calculated using the fractal dimension method to quantitatively evaluate the heterogeneity of micro deformation of coal.Based on the physical description of fractal geo-metry and micro-strain deformation distribution,the relationship between fractal dimension D and anisotropic deformation character-istics of methane adsorption was also discussed.The results indicate that:the expansion deformation of coal adsorbing gas first com-presses pores or cracks to obtain a larger expansion space;the heterogeneity of microscopic deformation caused by coal adsorbing methane conforms to the fractal characteristics;the fractal dimension is negatively correlated with the expansion and deformation rate of coal after methane adsorption;the higher the expansion and deformation rate is,the lower the fractal dimension is.In other words,the larger the expansion of coal after methane adsorption is,the lower the irregularity of the overall heterogeneous strain de-formation of coal is.On the contrary,the lower the value of expansion deformation rate,the higher the fractal dimension,and the higher the irregularity of the whole heterogeneous strain deformation of coal.关键词
CT扫描/煤吸附甲烷/细观应变变形/非均质性/分形维数Key words
CT scanning/coal adsorbing methane/microscopic strain deformation/heterogeneity/fractal dimension分类
矿业与冶金引用本文复制引用
范鹏宏,聂百胜..基于CT图像的煤吸附甲烷细观变形分形特性研究[J].煤矿安全,2024,55(10):28-37,10.基金项目
山西省高等学校科技创新资助项目(2020L0723) （2020L0723）
阳泉市科技局重点研发计划资助项目(2020YF039) （2020YF039）
山西工程技术学院校级科研启动资助项目(2021QD-05) （2021QD-05）
