Tunnel rock burst precursor warning method based on distributed optical fiber

CN122454731APending Publication Date: 2026-07-24SHANXI CHENGDA HIGHWAY SURVEY & DESIGN CO LTD
View PDF 0 Cites 0 Cited by

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
SHANXI CHENGDA HIGHWAY SURVEY & DESIGN CO LTD
Filing Date
2026-04-30
Publication Date
2026-07-24

AI Technical Summary

Technical Problem

Existing rockburst early warning technologies suffer from poor synchronization of multiple parameters, weak anti-interference capabilities, inability to effectively reflect the co-evolutionary laws of slow and fast variables, and are prone to false alarms or missed alarms, and cannot integrate multi-dimensional precursor information.

Method used

By deploying distributed optical fibers across the entire area, slow and fast variable data of the tunnel surrounding rock are collected synchronously. Temperature decoupling and non-Gaussian noise suppression are performed to construct a slow variable damage evolution field and a fast variable micro-fracture event field. The branching ratio and topological persistent energy are calculated using the Hawkes model, multi-dimensional precursor evidence is integrated, and the evidence is fused using the vine-like Copula model for risk calibration and early warning.

Benefits of technology

It achieves a complete description of the rockburst incubation process, eliminates environmental temperature interference, and fully preserves the transient signals of micro-fractures, thereby improving the accuracy and reliability of early warning and reducing false alarms and missed alarms.

✦ Generated by Eureka AI based on patent content.

Smart Images

  • Figure CN122454731A_ABST
    Figure CN122454731A_ABST
Patent Text Reader

Abstract

The application belongs to the field of intelligent early warning, and particularly relates to a tunnel rock burst precursor early warning method based on distributed optical fibers, which comprises the following steps: data acquisition, global distribution and multi-parameter synchronous acquisition through the distributed optical fibers, acquisition of slow variable and fast variable sequences, alignment to a unified time axis through coordinate mapping and clock synchronization; characteristic analysis, temperature decoupling and non-Gaussian noise suppression on the sequences, construction of slow variable damage evolution field and fast variable micro-fracture event field, calculation of branching ratio and extraction of topological persistent energy, integration into multi-dimensional precursor evidence; decision processing, evidence fusion through the vine Copula, conformal prediction calibration confidence, output of early warning based on the stable and unstable incubation model of the reductio ad absurdum evidence ratio and triple gate conditions; and the application provides protection for tunnel construction safety through rock burst precursor identification and stable false alarm rate control.
Need to check novelty before this filing date? Find Prior Art