Scholarlink

<p>To enhance the impact resistance of mine roadway support systems, this study designed an externally installed energy-absorbing device for unit-type hydraulic supports, consisting of foam-filled metal tubes. The device integrates Enriched Fiber Foamed Concrete (EFFC) into thin-walled square metal tubes, forming a lightweight rigid-flexible composite. Simulation and low-speed loading experiments were conducted to optimize energy absorption performance through three key parameters: EFFC material properties, thin-walled square tubes with induced defects, and EFFC-filled tube configurations. Compression tests on EFFC specimens revealed density-dependent deformation mechanisms, identifying 500&#xa0;kg/m<sup>3</sup> as the optimal filling density. Comparative experiments on five types of defect-induced EFFC-filled tubes demonstrated superior energy absorption and load characteristics relative to unfilled tubes. Key findings reveal a maximum load reduction of 29% in the composite compared to bare tubes, energy absorption capacity exceeding the sum of unfilled tubes and EFFC by up to 94.5%, and a 21% improvement in load fluctuation coefficient indicating reduced impact propensity. This cost-effective composite design provides a viable solution for anti-impact support equipment in coal mines, balancing high energy absorption with structural stability.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Study on energy absorption characteristics of EFFC-filled thin-walled metallic square tube rigid-flexible coupled body

  • 期刊论文

  • 出版模式：

    开放获取

  • 发表日期：

    2025年11月12日

查看全文
  • Jie Wang,
  • Ce Chen,
  • Xiankun Zhao,
  • Yonghui Xiao,
  • Jianzhuo Zhang,
  • Yishan Pan

摘要

To enhance the impact resistance of mine roadway support systems, this study designed an externally installed energy-absorbing device for unit-type hydraulic supports, consisting of foam-filled metal tubes. The device integrates Enriched Fiber Foamed Concrete (EFFC) into thin-walled square metal tubes, forming a lightweight rigid-flexible composite. Simulation and low-speed loading experiments were conducted to optimize energy absorption performance through three key parameters: EFFC material properties, thin-walled square tubes with induced defects, and EFFC-filled tube configurations. Compression tests on EFFC specimens revealed density-dependent deformation mechanisms, identifying 500 kg/m3 as the optimal filling density. Comparative experiments on five types of defect-induced EFFC-filled tubes demonstrated superior energy absorption and load characteristics relative to unfilled tubes. Key findings reveal a maximum load reduction of 29% in the composite compared to bare tubes, energy absorption capacity exceeding the sum of unfilled tubes and EFFC by up to 94.5%, and a 21% improvement in load fluctuation coefficient indicating reduced impact propensity. This cost-effective composite design provides a viable solution for anti-impact support equipment in coal mines, balancing high energy absorption with structural stability.