在三轴压缩试验中研究了BR的能量演变机制和周期性微碎裂
Yuye Tan1,2, Ziyi Zeng3,4, Jiazhao Chen5
1Key Laboratory of High-Efficient Mining and Safety of Metal Mines (Ministry of Education of China), University of Science and Technology Beijing, Beijing, 100083, China.
Scientific reports
|December 8, 2025
概括
填充后封装岩石 (BR) 复合结构对于地下采矿稳定性至关重要. 这项研究揭示了BR BR.
科学领域:
- 采矿工程 采矿工程 采矿工程
- 地质技术工程 地质技术工程
- 材料科学 材料科学 材料科学
背景情况:
- 填埋采矿对于绿色采矿至关重要,因为它具有安全性,效率和环境效益.
- 复合结构的稳定性对于地下金属采矿的整体稳定性至关重要.
- 复杂的地下环境中现场应力控制的越来越严格的标准需要先进的回填采矿方法.
研究的目的:
- 在三轴压缩下研究回填封岩 (BR) 复合结构的变形和故障机制.
- 分析BR复合材料中的应力-应变行为,能量演变和裂传播.
- 在实际的采矿工程中提供关于杆结构稳定性的指导.
主要方法:
- 在BR复合结构,单岩石和回填上进行三轴压缩试验.
- 声波排放 (AE) 监测,以追踪微型破裂.
- 计算机断层扫描 (CT) 技术用于可视化内部结构和多孔性变化.
- 变形和故障的理论分析.
主要成果:
- BR复合结构在其应力-变异曲线中呈现六个阶段,声辐射演变中有五个阶段.
- BR复合材料的峰值强度比纯岩石低20% - 30%,而残余强度比纯填充强度高65% - 80%.
- 限制压力影响BR的峰值强度和能量释放;CT扫描显示有孔度变化和裂传播.
结论:
- 该研究澄清了高压力下BR复合材料的故障规律,突出了回填和岩石之间的协同机械效应.
- 这些发现为BR结构的机械行为提供了关键的见解,这对于停止稳定性至关重要.
- 这项研究为优化回填采矿方法和确保地下运营中停止完整性提供了有价值的指导.
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