关于柱子尺寸对岩石中洞穴稳定性的意义的研究,这些洞穴具有很高的超负荷
Anant Kumar Shukla1, Arvind Kumar Mishra1, Tanwee Mazumder2
1Indian Institute of Technology (Indian School of Mines), Dhanbad, India.
Heliyon
|July 8, 2024
概括
这项关于洞穴稳定的研究发现,最佳的柱子宽度可以减少压力和塑料区域重叠. 这确保了更好的应力再分配和地下挖掘的稳定性.
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
- 水电工程项目工程 水电工程项目工程
背景情况:
- 在地下挖掘中,洞穴的稳定性至关重要,特别是在水电发电等大型项目中.
- 柱子的宽度显著影响着应力分布和相邻洞穴之间的塑料区域发展的潜力.
- 了解这些关系对于安全高效的洞穴设计至关重要.
研究的目的:
- 调查不同柱子宽度对电站洞穴 (PHC) 和变压器洞穴 (TC) 稳定性的影响.
- 确定最佳的柱子宽度,以提高洞穴的稳定性并最大限度地降低地质技术风险.
- 分析与柱子尺寸相关的应力分布和塑性区域发展.
主要方法:
- 使用有限元素方法进行2D和3D数值分析.
- 研究了两个柱子宽度与洞穴宽度 (w/B) 的比率:1.5和3.0.
- 评估了主要稳定性方面,包括主要主要应力和塑性区域形成.
主要成果:
- 确定了最佳的支柱宽度,从而减少了外围应力和改善了应力分布.
- 最佳的宽度防止了电厂洞穴和变压器洞穴之间的塑料区域重叠.
- 最佳的柱子宽度有助于在挖掘过程中更早地稳定现场应力.
结论:
- 建议柱子宽度大约等于最大洞穴尺寸或最大洞穴宽度的两倍,以获得最佳的稳定性.
- 沿着柱子宽度的最大应力发生在中高处,并集中在洞穴面附近.
- 这些发现为水电项目中洞穴的设计和稳定性评估提供了关键的见解.
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