用螺栓增强的道面的稳定性分析,考虑到中间的主要应力组件
Kai Xu1,2, Xiang Chen2,3, Gaofeng Luo2,3
1State Key Laboratory of Hydraulics and Mountain River Engineering, College of Water Resource and Hydropower, Chengdu, 610207, China.
Scientific reports
|October 16, 2025
概括
螺栓增强和预加固通过考虑中间主应力来提高道面的稳定性. 最佳的螺栓长度和预槽提高了岩石的强度,减少了变形和崩的风险,使道更安全.
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
- 道道是为了道.
背景情况:
- 道面的稳定性在挖掘中至关重要,但传统方法往往忽略了中间主应力.
- 岩石的机械行为受到中间主要应力的影响,影响稳定性分析.
研究的目的:
- 调查螺栓增强和预的有效性,以提高道面的稳定性.
- 开发和验证一个3D模型,使用Mogi Coulomb标准结合中间主应力.
主要方法:
- 开发了一个全面的3D数值模型来模拟道面的稳定性.
- 使用莫吉·库伦标准来解释中间主应力的影响.
- 分析了螺栓增强和预接技术对稳定性的影响.
主要成果:
- 发现关键螺栓增强长度是道直径的1.5至2.5倍之间,减少了挤出.
- 预接有效地增加了周围岩石的凝聚力和强度,防止透和崩.
- 安全系数 (SF) 最初随中间主应力系数的增加而增加,达到0.5,然后下降.
结论:
- 螺栓增强和预是提高道面稳定的有效策略.
- 拟议的3D模型,包括中间主应力,提供可靠和实用的见解.
- 这项研究为优化道运营中的增强策略提供了指导方针.
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