A method for evaluating the tendency of rock burst types

Through the true three-axis cycle unloading test and the true three-axis rock burst test, the energy ratio of the rock burst potential type assessment is calculated, which solves the problem of incomplete assessment of the impact of different types of rock bursts in the existing technology, and achieves a comprehensive assessment and safety improvement of underground engineering rock burst types.

CN115165629BActive Publication Date: 2025-05-13NORTHEASTERN UNIV CHINA
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Patent Information

Application Number
CN202210750932.2
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2022-06-28
Publication Date
2025-05-13
Estimated Expiration
2042-06-28

AI Technical Summary

Technical Problem

The existing research on rock burst tendency has failed to comprehensively evaluate the impact of different types of rock bursts on underground projects, resulting in safety hazards during construction.

Method used

Through the true triaxial cycle unloading test and the true triaxial rock burst test, the remaining elastic properties of the rock sample and the critical energy of the rock burst ejection were obtained, the potential occurrence type of rock burst was calculated to evaluate the energy ratio ω, and the tendency of the rock burst occurrence type was judged.

Benefits of technology

From an energy perspective, this method comprehensively evaluates the types of rock bursts that may occur in underground projects, provides a more comprehensive reference, and implements precise measures for the prevention and control of different types of rock burst disasters, so as to improve the safety of underground projects.

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Abstract

The present invention relates to a method for evaluating the tendency of rock burst types, including: S1. For a pre-prepared rock specimen, the residual elastic energy U of the rock specimen is obtained through a true triaxial cyclic loading and unloading test r ; the critical energy U for rock burst ejection of the rock specimen is obtained through a true triaxial rock burst test c ; S2. Based on the residual elastic energy U r and the critical energy U for rock burst ejection c , calculate the evaluation energy ratio ω for the potential occurrence type of rock burst, ω = U r / U c ; S3. Judge the tendency of the rock burst occurrence type according to the value of ω. This evaluation method can predict the potential occurrence type of rock burst, so as to evaluate the possible rock burst types in underground engineering, provide a more comprehensive reference for the construction work of underground engineering, facilitate the precise implementation of prevention and control measures for different types of rock burst disasters, and improve the safety of underground engineering.
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