Scholarlink

<p>Rock residual strength, as an important input parameter, plays an indispensable role in proposing the reasonable and scientific scheme about stope design, underground tunnel excavation and stability evaluation of deep chambers. Therefore, previous residual strength models of rocks established were reviewed. And corresponding related problems were stated. Subsequently, starting from the effects of bedding and whole life-cycle evolution process, series of triaxial mechanical tests of deep bedded sandstone with five bedding angles were conducted under different confining pressures. Then, six residual strength models considering the effects of bedding and whole life-cycle evolution process were established and evaluated. Finally, a cohesion loss model for determining residual strength of deep bedded sandstone was verified. The results showed that the effects of bedding and whole life-cycle evolution process had both significant influences on the evolution characteristic of residual strength of deep bedded sandstone. Additionally, residual strength parameters: residual cohesion and residual internal friction angle of deep bedded sandstone were not constant, which both significantly changed with increasing bedding angle. Besides, the cohesion loss model was the most suitable for determining and estimating the residual strength of bedded rocks, which could provide more accurate theoretical guidance for the stability control of deep chambers.</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

A cohesion loss model for determining residual strength of deep bedded sandstone

  • 期刊论文

  • 发表日期：

    2025年7月1日

查看全文
  • Zhi-xiang Song,
  • Jun-wen Zhang,
  • Yu-jie Zhang,
  • Shao-kang Wu,
  • Xu-yang Bai,
  • Li-chao Zhang,
  • Sui-lin Zhang,
  • Xu-wen Zhang,
  • Guang-chen Fan,
  • Wen-jun Li,
  • Ban-quan Zeng,
  • Shi-ji Wang,
  • Xiao-yan Sun,
  • Pei-miao Sang,
  • Ning Li

摘要

Rock residual strength, as an important input parameter, plays an indispensable role in proposing the reasonable and scientific scheme about stope design, underground tunnel excavation and stability evaluation of deep chambers. Therefore, previous residual strength models of rocks established were reviewed. And corresponding related problems were stated. Subsequently, starting from the effects of bedding and whole life-cycle evolution process, series of triaxial mechanical tests of deep bedded sandstone with five bedding angles were conducted under different confining pressures. Then, six residual strength models considering the effects of bedding and whole life-cycle evolution process were established and evaluated. Finally, a cohesion loss model for determining residual strength of deep bedded sandstone was verified. The results showed that the effects of bedding and whole life-cycle evolution process had both significant influences on the evolution characteristic of residual strength of deep bedded sandstone. Additionally, residual strength parameters: residual cohesion and residual internal friction angle of deep bedded sandstone were not constant, which both significantly changed with increasing bedding angle. Besides, the cohesion loss model was the most suitable for determining and estimating the residual strength of bedded rocks, which could provide more accurate theoretical guidance for the stability control of deep chambers.