含有草的水泥尾巴的强度特征在不同的应变率下进行填充
Zeyu Li1, Xiuzhi Shi1, Xin Chen1,2,3
1School of Resources and Safety Engineering, Central South University, Changsha 410083, China.
Materials (Basel, Switzerland)
|September 13, 2025
概括
将大米草纤维添加到水泥尾矿回收填充中,可以显著提高其强度和抵抗爆炸压力波的抵抗力. 然而,过度的纤维含量可能会对长期耐用性产生负面影响.
科学领域:
- 采矿工程 采矿工程 采矿工程
- 材料科学 材料科学 材料科学
- 地质技术工程 地质技术工程
背景情况:
- 地下矿井的爆炸会产生压力波,这是回填崩的主要原因.
- 提高回填强度对于减轻损坏和提高矿山安全至关重要.
- 传统的水泥尾矿回收填充 (CTB) 面临的挑战是动态应力抵抗.
研究的目的:
- 调查米草纤维增强水泥尾矿回填 (RSCTB) 在改善机械性能方面的有效性.
- 评估草纤维对无限制压力强度 (UCS) 和动态无限制压力强度 (DUCS) 的影响.
- 为了确定米草纤维的最佳使用,以提高回填性能.
主要方法:
- 在系统测试中使用了正交的实验设计.
- 进行了不受限制的压力强度 (UCS) 测试,以评估静态强度.
- 分割霍普金森压力棒 (SHPB) 测试进行评估动力强度.
- 为了了解流动特性,进行了扩散度测量.
主要成果:
- 与CTB相比,草纤维略有降低了泥流动性,但与CTB相比,UCS显著增加了50%以上.
- 随着变压率的上升,RSCTB显示了DUCS的线性增加.
- 草纤维对UCS和DUCS的影响比水泥含量和固体质量度要少.
结论:
- 与传统的回填相比,RSCTB在静态和动态强度上提供了显著的改进.
- 优化草纤维含量是必不可少的,因为过量可以损害长期的抗冲击能力.
- 这些发现为开发更强大,更有弹性的矿山填充材料提供了宝贵的见解.
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