在固体矿中破坏溶解盐柱的自我愈合特性
Luwei Zhang1,2, Gaofeng Ren1,2,3, Yongxiang Ge1,2
1Key Laboratory of Green Utilization of Key Non-Metallic Mineral Resources, Ministry of Education, Wuhan University of Technology, Wuhan 430070, China.
溶解的盐柱在10%的湿度和30天内表现出最佳的自我愈合,增强机械性能. 微观机制,包括扩散和再结晶,驱动损坏恢复,对于采矿应用至关重要.
科学领域:
- 材料科学 材料科学 材料科学
- 地质技术工程 地质技术工程
- 矿物学是什么?矿物学是什么?
背景情况:
- 溶解的盐柱在地下采矿操作中至关重要.
- 了解它们的机械行为和自我愈合对于结构完整性至关重要.
- 以前的研究还没有完全阐明湿度和时间对自我愈合机制的影响.
研究的目的:
- 研究溶解盐柱的自我愈合特性和机械损伤特征.
- 分析不同湿度和时间条件对愈合和机械强度的影响.
- 确定负责这些材料中损伤愈合的微观机制.
主要方法:
- 溶解盐柱样本的单轴机械测试.
- 扫描电子显微镜 (SEM) 用于微观分析矿物形态和元素分布.
- 使用菌株等效原理分析损害演变.
主要成果:
- 在10%的湿度和30天的维护条件下观察到最佳的自我愈合和机械性能 (压力强度,弹性模量).
- 达到的最大值是:愈合强化 (3.48),压力强度 (8.07 MPa) 和弹性模量 (650 MPa).
- 损伤从拉力转变为剪切滑动类型,并愈合,表明脆弱性增加.
结论:
- 自愈是依赖湿度和时间的,具有最佳范围的增强机械性能.
- 微观机制包括扩散,再结晶和粘附,这些都加强了微裂.
- 这些发现为在固体盐矿床中填充采矿提供了理论指导.
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