Working Paper Article Version 1 This version is not peer-reviewed

Research on Cantilever Rock Stability Evaluation and Early Warning Method Based on the Vibration Frequency

Version 1 : Received: 11 April 2021 / Approved: 12 April 2021 / Online: 12 April 2021 (13:07:59 CEST)

How to cite: Liu, W.; Xie, M.; Zhang, L.; Li, Q.; Wang, H. Research on Cantilever Rock Stability Evaluation and Early Warning Method Based on the Vibration Frequency. Preprints 2021, 2021040307 Liu, W.; Xie, M.; Zhang, L.; Li, Q.; Wang, H. Research on Cantilever Rock Stability Evaluation and Early Warning Method Based on the Vibration Frequency. Preprints 2021, 2021040307

Abstract

For the quantitative evaluation of rock stability and early warning of rock damage based on vibration monitoring, this article analyzed the relationship between the stability of cantilevered rock and its rock bridge length, the relationship between rock bridge length and rock vibration frequency. It established a method for calculating the natural frequency of cantilevered rock. The method can use two sets of rock natural frequency and rock bridge length data obtained from field investigation to determine the natural frequency calculation formula. The rock's model experiments show that the relative error between the rocks natural frequency at the time of damage calculated based on this formula and the measured value was 4.27%. The stability change of the rock can be accurately evaluated using this formula. Compared with the displacement, which only produces sudden change before the rock is damaged, the rocks natural frequency decreases irreversibly in the early stage of rock stability decline. Therefore, monitoring the vibration frequency of rocks can warn the damage of rocks.

Subject Areas

cantilevered rock; rock bridge; natural frequency; rock stability

Comments (3)

Comment 1
Received: 14 April 2021
Commenter: Chen Zhao
The commenter has declared there is no conflict of interests.
Comment: Calculate the dynamic index of dangerous rock mass through accurate mathematical formula. This method provides strong theoretical support for the quantitative judgment and early warning of dangerous rock masses using dynamic indicators.
+ Respond to this comment
Comment 2
Received: 14 April 2021
The commenter has declared there is no conflict of interests.
Comment: The stability of the cantilever rock is connected with the critical length of the rock bridge. It is concluded that the monitoring method based on natural frequency is more effective than measuring rock displacement. Considering the stability of dangerous rock masses from the perspective of vibration is more novel and reliable.
+ Respond to this comment
Comment 3
Received: 14 April 2021
Commenter: Tan Tian Yu
The commenter has declared there is no conflict of interests.
Comment: The stability of the cantilever rock is connected with the critical length of the rock bridge. It is concluded that the monitoring method based on natural frequency is more effective than measuring rock displacement. Considering the stability of dangerous rock masses from the perspective of vibration is more novel and reliable.
+ Respond to this comment

We encourage comments and feedback from a broad range of readers. See criteria for comments and our diversity statement.

Leave a public comment
Send a private comment to the author(s)
Views 0
Downloads 0
Comments 3
Metrics 0


×
Alerts
Notify me about updates to this article or when a peer-reviewed version is published.
We use cookies on our website to ensure you get the best experience.
Read more about our cookies here.