增强装置用于改善岩石支中 anchor 电缆的剪切性能
Chao Feng1,2, Shaowei Liu1,3, Housheng Jia1
1School of Energy Science and Engineering, Henan Polytechnic University, Jiaozuo 454000, China.
Materials (Basel, Switzerland)
|January 11, 2024
概括
研究人员开发了一种电缆螺栓.
科学领域:
- 地质技术工程 地质技术工程
- 岩石机械学 岩石机械学
- 土木工程 土木工程是指土木工程.
背景情况:
- 在民用和采矿业务中,终端固定电缆螺栓对于岩石支至关重要.
- 电缆螺栓的自由部分 (CBFS) 容易发生剪切故障,这是由于其暴露的表面和薄弱的剪切性能.
- 现有的设计通常在拉力剪切应力下失败,损害结构完整性.
研究的目的:
- 为了研究电缆螺栓自由部分 (CBFS) 的剪切故障机制.
- 开发和评估一种新型装置,以提高CBFS的剪切阻力.
- 在民用和采矿应用中提高周围岩石的稳定性.
主要方法:
- 进行了数值模拟,以分析剪切特性和故障模式.
- 实验室实验,包括双剪切试验,在裸体和加强的电缆螺栓上进行.
- 一个电缆螺栓的自由截面增强装置 (CFSD) 被设计和测试.
主要成果:
- 发现更高的轴张力降低了电缆螺栓的剪切阻力.
- 拟议的CFSD,特别是Q型 (槽式钢管),显著提高了CBFS的剪切阻力.
- 双剪切测试显示,CFSD的峰值剪切力增加了31%,峰值轴力增加了18%,最终剪切位移增加了11%.
结论:
- CFSD有效地保护电缆螺栓免受剪切损伤,并提高其剪切性能.
- Q型CFSD提供最佳的保护,并改善了终端固定电缆螺栓的剪切阻力.
- 开发的设备有助于在地质技术应用中增强周围岩石的稳定性.
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