Experimental study on influence of positional relationship between dynamic load and long axis on impact rockburst in an elliptical cavern

WANG Yang; LIU Dong-qiao; REN Fu-qiang; HU Tian-xiang; HE Man-chao

doi:10.16285/j.rsm.2021.1920

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Experimental study on influence of positional relationship between dynamic load and long axis on impact rockburst in an elliptical cavern

更新时间：2026-06-25

- Experimental study on influence of positional relationship between dynamic load and long axis on impact rockburst in an elliptical cavern
- Vol. 43, Issue 9, Pages: 2347-2359(2022)
- 作者机构：
  
  1. 中国地质科学院地质力学研究所,北京,100081
  2. 自然资源部活动构造与地质安全重点实验室,北京,100081
  3. 中国地质调查局新构造地稳定性研究中心,北京,100081
  4. 中国矿业大学（北京）深部岩土力学与地下工程国家重点实验室,北京,100083
  5. 辽宁科技大学土木工程学院,辽宁,鞍山,114051
- 作者简介：
- 基金信息：
- DOI：10.16285/j.rsm.2021.1920
  CLC： TU452
- Online First：12 September 2022，
  
  Published：2022
- 稿件说明：
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WANG Yang, LIU Dong-qiao, REN Fu-qiang, et al. Experimental study on influence of positional relationship between dynamic load and long axis on impact rockburst in an elliptical cavern[J]. 2022, 43(9): 2347-2359.
DOI：

WANG Yang, LIU Dong-qiao, REN Fu-qiang, et al. Experimental study on influence of positional relationship between dynamic load and long axis on impact rockburst in an elliptical cavern[J]. 2022, 43(9): 2347-2359. DOI： 10.16285/j.rsm.2021.1920.

摘要

为探究扰动荷载与椭圆形洞室长轴的相对位置关系对冲击岩爆特征的影响机制，采用含椭圆形孔洞的长方体试样，在真三轴加载条件下，设置了扰动方向与椭圆长轴平行和垂直的两种位置关系，开展了椭圆形洞室冲击岩爆试验。结合录像装置，从岩爆弹射破坏过程、弹射速度、破坏模式及碎屑尺度几个方面讨论了椭圆形洞室冲击岩爆特征差异。试验结果表明，两种不同位置关系的试样岩爆过程相同，并且爆坑都呈现出 V 字型。扰动方向与椭圆长轴垂直的试样在初始破坏应力、岩爆破坏应力、岩爆弹射速度，爆坑尺寸、碎屑质量以及粗粒碎屑占比上均要小于扰动方向与椭圆长轴平行的试样。扰动方向与椭圆长轴垂直的试样的碎屑特征主要表现为薄片长条状。扰动方向与椭圆长轴平行的试样能明显提升洞室结构的承载力，但是岩爆现象更加剧烈，其碎屑特征主要表现为厚板状。

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