China Coal Technology and Engineering Group Shenyang Research Institute
State Key Laboratory of Coal Mine Safety Technology

为了以微观尺度研究原生煤体瓦斯赋存空间结构特征，基于压汞测试、低温N2吸脱附实验和X-ray CT扫描技术的综合运用，对原生结构气煤和焦煤多级孔隙团簇发育特征进行了定量分析和图像识别，揭示了不同变质程度煤中多级孔隙团簇的发育特征。结果表明：SQY焦煤渗流孔较少、吸附孔丰富，而XG气煤渗流孔分布广泛，吸附孔孔径缺陷小，多级孔隙团簇发育均衡是瓦斯大量赋存、高效渗流的结构基础；大量发育的XG气煤渗流孔隙团簇和SQY焦煤吸附孔隙团簇空间结构复杂，体积优势是重要诱因；X-ray CT扫描技术能精确识别煤孔隙发育形貌特征；XG气煤矿物分布没有增强多级孔隙团簇空间非均质性；SQY焦煤大量发育的矿物占据了基质空间，是导致多级孔隙团簇发育差、非均质性强的内在因素。

In order to study the spatial structure characteristics of gas occurrence in primary coal at micro scale, mercury injection test, N2 adsorption/desorption experiment and X-ray CT technology were used. The development characteristics of multiscale pore clusters of original structure gas coal and coking coal were quantitatively analyzed and image recognized, and the development characteristics of multiscale pore cluster were discussed. The results show that: SQY coking coal has few seepage pores and abundant adsorption pores, while XG gas coal has wide distribution of seepage pores and small pore size defects. The balanced development of multistage pore clusters is the structural basis of large amount of gas occurrence and efficient seepage. XG gas coal seepage pore clusters and SQY coking coal adsorption pore clusters developed in large quantities have complex spatial structures, and the volume advantage is an important incentive. X-ray CT technology can accurately identify the pore morphology of coal. XG gas coal mineral distribution does not enhance the spatial heterogeneity of multistage pore clusters. A large number of minerals developed in SQY coking coal occupy the matrix space, which is the internal factor leading to poor development of multistage pore clusters and strong heterogeneity.

刘锋. 原生煤体多级孔隙团簇发育特征及其CT图像识别[J]. 煤矿安全，2023，54（9）：37−45

LIU Feng. Study on development characteristics of multiscale pore clusters in original coal and their CT image recognition[J]. Safety in Coal Mines, 2023, 54（9）: 37−45