煤炭裂的定量表征和进化模式基于裂张量分析.
Pengyu Mu1, Shouguang Wang2,3, Jiamin Wang1
1Academy of Deep Earth Sciences, China Coal Research Institute, Beijing, 100013, China.
Scientific reports
|April 11, 2025
概括
这项研究使用计算机断层扫描 (CT) 来分析压力下煤炭裂的演变. 裂纹张量分析量化了损害,揭示了压力和裂纹演变之间的指数关系,用于评估煤炭完整性.
科学领域:
- 地质技术工程 地质技术工程
- 材料科学 材料科学 材料科学
- 岩石力学 岩石力学 岩石力学
背景情况:
- 煤炭的变形和故障受到内部裂结构的重大影响.
- 裂特征及其演变的定量表征对于理解煤炭行为至关重要.
- 以前的方法缺乏对裂演变的全面多维分析.
研究的目的:
- 通过使用计算机断层扫描 (CT) 来研究在单轴压缩下煤样本中裂的演变.
- 应用裂张量理论来定量描述裂特征及其进化模式.
- 根据裂纹张量参数,建立应力水平和煤炭损伤之间的关系.
主要方法:
- 利用计算机断层扫描 (CT) 系统,在各种单轴压缩阶段观察装载煤样中的裂演变.
- 应用了裂纹张量理论来计算每个阶段的裂纹张量参数 (方向,结构和整体张量).
- 分析了煤裂织物张量器的痕迹,以量化裂演变模式及其与压力的关系.
主要成果:
- 裂方向张量器准确地反映了平均裂方向.
- 裂纹织物张量器有效地表示裂纹大小和损伤特征.
- 裂张量提供了煤炭裂的定量多维描述.
- 煤裂面料张器的痕迹显示出在进化过程中缓慢,稳定,然后快速增长的模式.
- 在煤裂张量和应用应力之间的痕迹之间确定了一个指数函数.
结论:
- 裂纹张量理论提供了一种可靠的方法,用于定量地描述多维裂纹特征和煤炭的演变.
- 煤裂面料张量器的痕迹可以作为监测裂演变模式的可靠指标.
- 已确定的应力损害关系使得在不同的应力条件下能够有效评估煤炭损害程度.
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