基于图像分析法的冲击倾向性煤体孔隙结构特征研究

doi:10.19286/j.cnki.cci.2025.12.002

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Abstract

In order to reveal the pore structure characteristics of coal with different burst tendency, three coal samples with different burst tendency were selected from Shanxi Tianchi Coal Mine, Yuwu Coal Mine and Lu 'an Wangzhuang Coal Mine. The microscopic surface morphology and three-dimensional pore structure were systematically analyzed by scanning electron microscopy ( SEM ) and micro-CT technology. The results show that the burst tendency of coal is closely related to its pore morphology and spatial distribution. The surface of the coal sample with strong impact tendency is folded and developed, and the internal pores are mainly banded extrusion pores. The compactness is high, the porosity is relatively low, the overall homogenization degree is high, and the energy accumulation and instantaneous release are easy to occur. The coal samples with weak impact tendency have extrusion fractures and secondary microcracks, with high porosity and strong connectivity, and have certain advantages of gas seepage. The surface of the non-impact prone coal sample is relatively flat, and the internal pores are mainly intergranular pores, which are unevenly distributed and locally concentrated, and the pressure bearing capacity is low. The three-dimensional pore network model further reveals the differences in pore size distribution, coordination number and throat characteristics of different coal samples. The research in this paper can provide a microscopic basis for the analysis of the coupling mechanism between rock burst and gas disaster in deep coal, and has certain guiding significance for the prevention and control of rock burst and gas control in coal mines.

Key words： impact tendency pore structure scanning electron microscope CT

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	Articles by authors
	Fan Jiulin 1
	Li Pengfeng 2
	Wang Lei 3

Cite this article:

Fan Jiulin 1,Li Pengfeng 2,Wang Lei 3. Study on pore structure characteristics of burst prone coal based on image analysis method[J]. CCI, 2025, 48(12): 9-14.

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http://www.mtyhg.com.cn/EN/10.19286/j.cnki.cci.2025.12.002 OR http://www.mtyhg.com.cn/EN/Y2025/V48/I12/9

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