Prediction and analysis of surge generated by crushing failure collapse of columnar dangerous rock mass

ZHANG Quan; HUANG Bo-lin; ZHENG Jia-hao; ZHAO Hai-lin; FENG Wan-li; CHEN Xiao-ting

doi:10.16285/j.rsm.2020.0464

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Prediction and analysis of surge generated by crushing failure collapse of columnar dangerous rock mass

更新时间：2026-06-25

- Prediction and analysis of surge generated by crushing failure collapse of columnar dangerous rock mass
- Vol. 42, Issue 10, (2021)
- 作者机构：
  
  1. 三峡大学防灾减灾湖北省重点实验室,湖北,宜昌,443002
  2. 中国地质大学（武汉）工程学院,湖北,武汉,430074
- 作者简介：
- 基金信息：
- DOI：10.16285/j.rsm.2020.0464
  CLC： P642.21;TV139.23
- Online First：20 October 2021，
  
  Published：2021
- 稿件说明：
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ZHANG Quan, HUANG Bo-lin, ZHENG Jia-hao, et al. Prediction and analysis of surge generated by crushing failure collapse of columnar dangerous rock mass[J]. 2021, 42(10).
DOI：

ZHANG Quan, HUANG Bo-lin, ZHENG Jia-hao, et al. Prediction and analysis of surge generated by crushing failure collapse of columnar dangerous rock mass[J]. 2021, 42(10). DOI： 10.16285/j.rsm.2020.0464.

摘要

三峡库区柱状危岩体十分发育，水位变动加速了柱状危岩体基座岩体劣化，增加了其压溃式崩塌危险性，另外，潜在涌浪灾害对航运安全产生威胁。根据三峡库区相关危岩体调（勘）查资料，构建了颗粒柱状崩塌动力观测系统和试验平台，开展了颗粒柱体崩塌涌浪物理模型试验。试验结果表明：危岩体压溃式的破坏模式与试验颗粒柱体崩塌下坠?滑动的复合运动的破坏模式较为类似；颗粒柱体的阶段性运动可由重心运移速度解析，重心运移速度可以代表颗粒体速度；多元非线性回归推导了颗粒体入水速度和最大波幅的计算公式，弗劳德数为最大波幅公式的主要敏感因素；与刚性块体下沉的预测公式相比较，所推导的试验公式计算更适合压溃式破坏模式，预测精度更高。该研究将为库区柱状危岩体失稳产生涌浪预测提供技术支撑。

Abstract

The columnar dangerous rock mass is well developed in the Three Gorges Reservoir area. The change of water level accelerates the deterioration of the pedestal rock mass of the columnar dangerous rock mass and increases the risk of its crushing failure collapse. The potential surge disaster threatens the safety of shipping. According to the survey data of relevant dangerous rock masses in the Three Gorges Reservoir area

a dynamic observation system and experiment platform for particle column collapse was constructed

and physical model experiments on granular column collapse surge were carried out. The experiment results show that the crushing failure mode of dangerous rock mass is similar to that of the composite movement of collapsing-sliding of the experimental granular column. The staged motion of the granular column can be analyzed by the velocity of gravity center

which can represent the velocity of the particles. Formulas are derived by the nonlinear regression to estimate the water entry velocity of the particle and the maximum amplitude of surge. The Froude number is the main sensitive factor of the formula. Compared with the prediction formula of rigid block subsidence

the experimental formula in this paper is more suitable for crushing failure mode and has higher prediction accuracy. This research will provide the technical support for the prediction of the surge caused by the instability of the columnar dangerous rock mass in the reservoir area.

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