The microscopic pore structure of coal affects the content of adsorbed gas. The microstructure of coal sample before and after loading is different, which will affect the adsorption and permeability of coal seam gas. In order to study this difference, the authors carried out mercury intrusion experiments on coal containing different coal samples and used nondestructive nuclear magnetic resonance (NMR) techniques, scanning electron microscopy, and transmission electron microscopy, to study the microstructure of coal samples before and after loading. The experimental results show that the pores of coal samples are mainly micropores and small pores, and the mesopores and macropores are relatively few. The T₂ spectrum area of the coal sample is significantly increased after loading, and the parallel-layer coal samples’ T₂ spectrum area is 46735, which is 9112 more than the vertical layer coal samples. The T₂ spectrum of the vertical coalbed of saturated water samples shows a three-peak shape, the peak of the T₂ spectrum is 12692, and the parallel bedding shows a bimodal morphology. The peak area of the T₂ spectrum is 11277. The permeability of the parallel bedding coal sample is good, and the coal sample exhibits anisotropic properties. The pores and cracks of the coal samples increased after loading, and the localized area of the coal sample collapsed and formed a fracture zone, which was not conducive to the occurrence of coal seam gas. Further explanation of the changes in the permeability of the coal sample before and after loading will affect the gas storage and transportation.

中文翻译：

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装煤前后煤样品微观结构差异的研究

煤的微观孔结构影响吸附气体的含量。煤样加载前后的微观结构不同，会影响煤层气的吸附和渗透性。为了研究这种差异，作者对包含不同煤样品的煤进行了压汞实验，并使用无损核磁共振（NMR）技术，扫描电子显微镜和透射电子显微镜研究了前后煤样品的微观结构。加载中。实验结果表明，煤样品的孔隙主要为微孔和小孔，中孔和大孔相对较少。的Ť ₂加载后，煤样的光谱面积显着增加，平行层煤样的T ₂谱面积为46735，比垂直层煤样大9112。所述Ť ₂的饱和水样表示垂直煤层三峰形状的光谱中，的峰Ť ₂频谱是12692，并且所述平行寝具节目的双峰形态。T ₂的峰面积光谱为11277。平行层理煤样品的渗透性良好，并且煤样品表现出各向异性。加载后，煤样的孔隙和裂缝增加，煤样的局部塌陷并形成断裂带，不利于煤层气的产生。加载前后煤炭样品渗透率变化的进一步解释将影响气体的储存和运输。