CFRP被动封闭煤样本的能量消耗损害构成关系被动封闭的煤样
Qingwen Li1, Fanfan Nie1, Chuangchuang Pan1
1School of Civil and Architectural Engineering, Liaoning University of Technology, Jinzhou, Liaoning, 121001, China.
Heliyon
|September 25, 2024
概括
碳纤维增强聚合物 (CFRP) 板通过提高强度和减少损坏来提高煤柱稳定性. 三层CFRP为煤柱提供最佳的强化,防止岩石爆裂并增加资源回收.
科学领域:
- 地质技术工程 地质技术工程
- 材料科学 材料科学 材料科学
- 采矿工程 采矿工程 采矿工程
背景情况:
- 煤柱对于矿山的稳定性至关重要,但容易发生故障.
- 需要加强战略,以改善煤炭资源的回收,并防止岩石爆裂等危险.
- 碳纤维增强聚合物 (CFRP) 板为加强这些结构提供了潜在的解决方案.
研究的目的:
- 在单轴压缩下,研究用CFRP板增强的煤样品的机械行为.
- 为了建立一个能量消耗损害构成关系的CFRP-confined煤.
- 确定CFRP层的最佳数量,以有效地加强煤柱.
主要方法:
- 单轴压缩测试是在煤样本上进行的,这些煤样本具有不同层的被动封闭的CFRP.
- 分析了机械反应,包括峰值强度,弹性模量和能量消耗.
- 一个损害构成关系和进化方程是基于能量消耗原理而开发的.
主要成果:
- 增加CFRP层改善了峰值强度和弹性模量,并观察到一个可量化的关系.
- 碳纤维纤维的限制改变了损伤演变模式,从"悬崖状纹"到"毛细血管纹"在峰值负荷之前.
- 随着CFRP层的增加,储能容量增加,能量消耗率呈现出最小的拐点.
- 碳复合纤维板显著抑制损伤,有效性在两层以上下降.
结论:
- 三层CFRP板块为煤柱提供最佳的封闭,增强稳定性并防止岩石爆裂.
- 碳复合纤维增强为改善煤炭资源回收提供了一种新且有价值的战略.
- 该研究为在煤柱强化和岩石破裂控制中应用CFRP提供了理论基础.
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