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危岩体崩塌灾害监测预警试验研究

杜岩 霍磊晨 谢谟文 蒋宇静 贾北凝 丛晓明

杜岩, 霍磊晨, 谢谟文, 蒋宇静, 贾北凝, 丛晓明. 危岩体崩塌灾害监测预警试验研究[J]. 力学学报, 2021, 53(4): 1212-1221. doi: 10.6052/0459-1879-20-441
引用本文: 杜岩, 霍磊晨, 谢谟文, 蒋宇静, 贾北凝, 丛晓明. 危岩体崩塌灾害监测预警试验研究[J]. 力学学报, 2021, 53(4): 1212-1221. doi: 10.6052/0459-1879-20-441
Du Yan, Huo Leichen, Xie Mowen, Jiang Yujing, Jia Beining, Cong Xiaoming. MONITORING AND EARLY WARNING EXPERIMENT OF ROCK COLLAPSE[J]. Chinese Journal of Theoretical and Applied Mechanics, 2021, 53(4): 1212-1221. doi: 10.6052/0459-1879-20-441
Citation: Du Yan, Huo Leichen, Xie Mowen, Jiang Yujing, Jia Beining, Cong Xiaoming. MONITORING AND EARLY WARNING EXPERIMENT OF ROCK COLLAPSE[J]. Chinese Journal of Theoretical and Applied Mechanics, 2021, 53(4): 1212-1221. doi: 10.6052/0459-1879-20-441

危岩体崩塌灾害监测预警试验研究

doi: 10.6052/0459-1879-20-441
基金项目: 1)国家重点研发计划(2018YFE0101100);国家自然科学基金(41572274);国家自然科学基金(41702371);中央高校基本科研业务专项(FRF-BD-20-01A)
详细信息
    作者简介:

    2)杜岩, 副教授, 主要研究方向: 岩土工程与岩石力学. E-mail: mutulei@163.com

    通讯作者:

    杜岩

  • 中图分类号: U260.17

MONITORING AND EARLY WARNING EXPERIMENT OF ROCK COLLAPSE

  • 摘要: 岩体崩塌破坏的突发性使其成为最难预防的地质灾害之一, 严重威胁人类的生命财产安全. 边坡岩块体崩塌破坏多是系统不稳定导致的动力破坏, 因此应用动力学指标进行监测预警更为有效. 本研究通过引入多种时域动力学监测指标, 开展了岩体崩塌破坏全过程的监测预警实验研究. 通过振动幅值、峭度指标等时域动力学指标监测, 可有效识别岩体分离破坏前兆现象, 提前55 s实现岩块体崩塌的早期预警. 多个时域动力学指标均可识别岩体破坏前的非协调性动力特征, 其中变异系数在识别这一振荡特征上优势明显, 可通过识别这一震荡特征实现崩塌灾害的早期预警. 此外, 破坏前岩体的振动速度是稳定岩体的2.1倍, 岩体破坏发生时刻赋存较大的冲击能量, 是岩体启程剧动的主要原因之一, 可通过综合分析峭度指标等时域动力学指标, 实现分离破坏前兆更为合理的判识. 本研究不仅为岩体崩塌灾害早期预警提供了新的数据与技术方法支持, 也为崩塌岩体启程剧动机制与破坏后运动特性研究提供了新的启示.

     

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  • 收稿日期:  2020-12-21
  • 刊出日期:  2021-04-10

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