在热冲击下花岩的动态损伤和裂传播:DEM建模见解
Longshan Su1,2, Hongyu Li3, Qifu Chi3
1Institute for Smart City of Chongqing University in Liyang, Jiangsu, China.
Scientific reports
|January 24, 2026
概括
增强地热系统 (EGS) 岩石经历热冲击和动态负荷的损伤. 数字模型显示,冷却导致了最多的裂,密度随温度和负载周期而增加,影响了EGS运行.
科学领域:
- 地质科学是地球科学.
- 材料科学 材料科学 材料科学
- 机械工程 机械工程
背景情况:
- 增强地热系统 (EGS) 中的岩石面临着联合的热和机械应力.
- 了解这些条件下的岩石行为对于EGS的效率和安全至关重要.
研究的目的:
- 为了研究在热冲击和动态负荷的结合下,花岩的裂演变和损伤.
- 在EGS.中为水库刺激和井口稳定提供数值洞察力.
主要方法:
- 使用离散元素方法 (DEM) 开发数值模型.
- 在侧面动态负载和冷却后的热冲击下对花岩进行系统的研究.
主要成果:
- 冷却诱导了最重要的裂纹形成,主要是拉力和拉力剪切类型.
- 裂纹密度随着热冲击温度的增加和动态负载周期的增加而升级.
- 在500°C时,花岩表现出相当大的机械性能恶化和广泛的裂.
结论:
- DEM模拟提供了关于裂传播和损坏的有价值的可视化.
- 这些发现对于评估水库刺激策略和确保EGS井口稳定性至关重要.
- 热冲击,特别是在冷却过程中,是EGS内岩石损伤的关键因素.
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