[1]白志鹏,韩亮,郝海红,等.煤体损伤破坏的微观多尺度时空演化特征研究*[J].中国安全生产科学技术,2026,22(5):31-39.[doi:10.11731/j.issn.1673-193x.2026.05.004]
Bai Zhipeng,Han Liang,Hao Haihong,et al.Study on the micro-to multi-scale spatiotemporal evolution of damage and failure in coal[J].Journal of Safety Science and Technology,2026,22(5):31-39.[doi:10.11731/j.issn.1673-193x.2026.05.004]
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煤体损伤破坏的微观多尺度时空演化特征研究*
Bai Zhipeng,Han Liang,Hao Haihong,et al.Study on the micro-to multi-scale spatiotemporal evolution of damage and failure in coal[J].Journal of Safety Science and Technology,2026,22(5):31-39.[doi:10.11731/j.issn.1673-193x.2026.05.004]
《中国安全生产科学技术》[ISSN:1673-193X/CN:11-5335/TB]
- 卷:
- 22
- 期数:
- 2026年5期
- 页码:
- 31-39
- 栏目:
- 安全工程技术
- 出版日期:
- 2026-05-30
文章信息/Info
- Title:
- Study on the micro-to multi-scale spatiotemporal evolution of damage and failure in coal
- 文章编号:
- 1673-193X(2026)-05-0031-09
- Keywords:
- coal damage; multiscale evolution; acoustic emission; nuclear magnetic resonance; single link cluster; seepage characteristics
- 分类号:
- X936
- 文献标志码:
- A
- 摘要:
- 为了揭示煤体损伤破坏的微观多尺度演化规律，采用声发射监测、核磁共振成像、工业CT扫描与渗流数值模拟等多维度技术，结合单轴压缩实验，系统研究煤体从微观孔隙演化至宏观破裂的全过程。研究结果表明：声发射时空分布随应力提高由分散转向集聚，短链路集群增多，反映了损伤局部化与裂纹成核的前兆；信号特征在峰值应力前后由高频低能向低频高能转变，可作为宏观失稳的预警指标。核磁共振显示存在临界应力阈值（约50.32 MPa），低于阈值时以孔隙压密为主，高于阈值则微裂隙贯通显著加剧，损伤加速扩展。渗流模拟进一步表明，损伤发展促使孔隙结构空间异质性增强，渗流路径集中，微裂隙区流速跃升，整体渗流能力提升。研究结果揭示了煤体损伤从压密到贯通的演化机制与关键临界特征。
- Abstract:
- In order to reveal the microscopic multi-scale evolution law of coal damage and failure,multi-dimensional techniques such as acoustic emission monitoring,nuclear magnetic resonance imaging,industrial CT scanning and seepage numerical simulation were used to systematically study the whole process of coal from microscopic pore evolution to macroscopic fracture in combination with uniaxial compression experiments.The results show that the spatial and temporal distribution of acoustic emission changes from dispersion to agglomeration with the increase of stress,and the number of short-link clusters increases,which reflects the precursors of damage localization and crack nucleation.The characteristics of the signal change from high-frequency,low-energy to low-frequency,high-energy before and after the peak stress,which can be used as an early warning indicator of macro-instability.Nuclear magnetic resonance (NMR) shows that there is a critical stress threshold (about 50.32 MPa).When the stress is lower than the threshold,pore compaction is the main factor.When the stress is higher than the threshold,the penetration of microcracks is significantly intensified,and the damage is accelerated.The seepage simulation further shows that the damage development enhances the spatial heterogeneity of the pore structure,the seepage path is concentrated,the flow velocity in the micro-fracture area jumps,and the overall seepage capacity is improved.The research results reveal the evolution mechanism and key critical characteristics of coal damage from compaction to penetration.
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相似文献/References:
[1]何峰,任天娇,周刚,等.基于近场动力学的煤体单轴压缩全过程损伤演化规律研究*[J].中国安全生产科学技术,2022,18(7):102.[doi:10.11731/j.issn.1673-193x.2022.07.015]
HE Feng,REN Tianjiao,ZHOU Gang,et al.Research on damage evolution law of coal and rock in whole process of uniaxial compression based on peridynamics[J].Journal of Safety Science and Technology,2022,18(5):102.[doi:10.11731/j.issn.1673-193x.2022.07.015]
备注/Memo
- 备注/Memo:
-
收稿日期： 2026-02-06；修回日期：2026-03-06；网络首发日期： 2026-04-15
* 基金项目： 国家自然科学基金面上项目（52474097，52274081）
作者简介： 白志鹏，本科，高级工程师，主要研究方向为矿井生产管理。
通信作者： 韩亮，博士，副教授，主要研究方向为矿山动力灾害监测与防治。
