动态损害演变和CT可视化和水盆地的南方部分在不同限制压力下的炭石的表征
Yingying Li1, Yimin Zhang1, Guoqiang Wang1
1School of Computer Science, Luoyang Institute of Science and Technology, Luoyang 471023, China.
ACS omega
|December 8, 2025
概括
这项研究使用CT扫描研究了煤炭断裂机制,揭示了压力如何影响裂网络和孔隙性. 这些发现指导了水盆地的高效煤床甲开采和矿山安全.
科学领域:
- 地质力学 地质力学
- 岩石物理 岩石物理
- 材料科学 材料科学 材料科学
背景情况:
- 有效地利用煤床甲 (CBM) 对能源安全至关重要.
- 了解压力下的煤炭断裂机制是CBM恢复和矿山稳定的关键.
- 南方的水盆地由于其地质特征,为CBM开采带来了独特的挑战.
研究的目的:
- 分析煤炭样本在不同限制压力下的机械性能,故障模式和断裂演变.
- 为了研究在炭石煤中骨折传播的微观机制.
- 为水盆地CBM刺激和地面控制提供理论指导.
主要方法:
- 压缩测试是在原始骨折的原始煤炭样本上进行的,这些样本来自Sihe矿.
- 使用同步和分阶段的实时CT扫描来监测骨折演变.
- 基于图像的细分和定量CT指标 (灰色值,骨折体积,孔径) 用于分析.
主要成果:
- 煤炭强度和弹性模量随着限制压力而增加,而剩余强度则通过摩擦保持.
- 新的断裂在现有断裂附近开始,裂网络在较低的限制下变得更加复杂,在更高的限制下变得更加分布.
- 定量CT指标可靠地表明了损伤的进展,孔隙性从最初的损伤阶段显著增加.
结论:
- 这项研究阐明了在压力下的炭酸煤中断裂传播机制.
- 随着越来越多的监禁,观察到从脆性转变为半脆性/半柔性行为的过渡.
- 这些发现为优化CBM开采和确保水盆地矿山安全提供了宝贵的见解.
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