基于能量消散的混合纤维尾部的水泥填充的损伤特征和损伤构成模型
Yulie Wu1, Yuhua Fu2,3, Rui Liu1
1School of Resources and Environmental Engineering, Jiangxi University of Science and Technology, Ganzhou, 341000, China.
Scientific reports
|September 25, 2025
概括
将玄武纤维 (BF) 和碳酸胡须 (CW) 添加到水泥糊补充剂 (CPB) 中,可以显著提高其机械性能和柔性. 最佳剂量可以将压力强度提高33%以上,并改变损伤机制以提高稳定性.
科学领域:
- 材料科学与工程 材料科学与工程
- 地质技术工程 地质技术工程
- 土木工程 土木工程是指土木工程.
背景情况:
- 矿山填充体对于地下稳定性和尾矿管理至关重要.
- 提高水泥回填充 (CPB) 的机械性能对于安全和高效的采矿操作至关重要.
- 了解压力下CPB的损伤演变和裂传播是提高其性能的关键.
研究的目的:
- 研究基岩纤维 (BF) 和碳酸胡须 (CW) 兴奋剂对CPB的机械性能,能量消耗和裂纹演变的影响.
- 建立一个细分的损害构成模型,用于纤维合的CPB.
- 分析BF和CW在CPB上的协同增强机制.
主要方法:
- 单轴压缩实验是对化和未化CPB标本进行的.
- 微结构性特征技术被用来分析内部结构和结合.
- 基于损伤力学理论开发了一个细分损伤构成模型,其中包含一个损伤纠正因子.
主要成果:
- 最佳剂量的BF (0.1%) 和CW (1%) 显著改善了单轴压力强度 (增加33.68%) 和柔性.
- BF 兴奋剂改变了损伤模式,从脆性到剪切或混合拉力剪切,具有裂抑制和应力分散.
- BF和CW的协同作用改善了孔隙结构,通过水化产品增强了纤维矩阵结合,并抑制了内部裂.
结论:
- BF和CW协同作用,增强CPB的机械性能和稳定性.
- 开发的细分损伤构成模型准确地预测了纤维化CPB的行为.
- 这项研究为改善尾矿利用率和矿山填充体稳定性提供了宝贵的见解.
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