在各种限制压力下对岩石填埋场的机械和介面性能进行研究
Bin Ou1,2,3, Haoquan Chi1,3, Zixuan Wang1,3
1College of Water Conservancy, Yunnan Agricultural University, Kunming 650201, China.
Materials (Basel, Switzerland)
|March 27, 2025
概括
增加限制压力提高了岩石填充的强度和稳定性,但也加剧了颗粒破裂. 这项研究使用了三轴测试和数值模拟来了解封闭下的岩石填充机械行为.
科学领域:
- 地质技术工程 地质技术工程
- 材料科学 是一种材料科学.
- 计算力学 计算力学 计算力学
背景情况:
- 堵塞岩石填埋材料对于基础设施的稳定性至关重要.
- 了解它们在不同限制压力下的机械反应对于安全设计至关重要.
- 现有的研究往往缺乏综合的宏观和微观分析.
研究的目的:
- 为了研究阻塞岩石填充材料的机械反应和故障机制.
- 分析限制压力对变形,强度和颗粒破裂的影响.
- 用数值模拟来阐明微机械行为.
主要方法:
- 在岩石填埋样本上进行了实验室三轴压缩测试.
- 粒子流代码2D (PFC2D) 用于数值模拟.
- 分析了宏观 (压力-应变) 和微观 (粒子破裂,接触力) 数据.
主要成果:
- 峰值偏差应力和剪切强度随着限制压力显著增加.
- 岩石填埋行为从延展转变为收缩,因为限制压力上升.
- 粒子破裂率增加,影响了颗粒状骨架和强度.
- 数字模拟证实了实验趋势,揭示了"X形"剪切带,并在高度限制下抑制了断裂传播.
- 粒子间接触和力链大小/频率随着囚禁而增加.
结论:
- 限制压力是控制岩石填充机械行为和故障模式的关键因素.
- 在高度封闭的情况下,颗粒破裂可以降低剪切强度,尽管接触力增加.
- 综合的实验和数值方法为岩石填充力学提供了全面的见解.
- 这些发现为大工程和建设优化提供了宝贵的指导.
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