A quantitative division method of deep roadway surrounding rock loose circle

By combining external anchor-type UWFBG strain optical cable and PSO-XGBoost regression model with numerical simulation dataset, quantitative division of loosened rock zones in deep roadways was achieved, solving the problems of insufficient monitoring accuracy and inconsistent standards in existing technologies, and providing a high-precision monitoring method for loosened rock zones.

CN122813693APending Publication Date: 2026-09-25INST OF ROCK & SOIL MECHANICS CHINESE ACAD OF SCI +1
0 Cites 0 Cited by

Patent Information

Application Number
CN202611231064.1
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2026-08-14
Publication Date
2026-09-25

AI Technical Summary

Technical Problem

Existing technologies for delineating loosened zones in deep tunnels suffer from problems such as strong subjectivity, lack of unified standards, insufficient adaptability of sensing equipment, and inconsistent labeling standards for machine learning training data, resulting in monitoring accuracy that is difficult to meet engineering requirements.

Method used

The strain values ​​of the surrounding rock were obtained by using an external anchor point UWFBG strain optical cable. Combined with the PSO-XGBoost regression model, a diverse training dataset was constructed through numerical simulation. The relative strain change rate was used as the input feature to achieve quantitative division of the loosened zone of the surrounding rock.

Benefits of technology

It enables effective monitoring of large deformations in the surrounding rock of deep roadways, solves the problems of insufficient range and poor long-term stability of sensing equipment, provides a unified judgment standard, and improves monitoring accuracy and cross-condition generalization ability.

✦ Generated by Eureka AI based on patent content.
Patent Text Reader

Abstract

The present application relates to roadway surrounding rock deformation monitoring technical field, disclose a kind of quantitative division method of deep roadway surrounding rock loose circle, comprising the following steps: step 1, obtains the surrounding rock strain value of multiple measuring points along the depth direction of roadway surrounding rock drill hole;Step 2, according to the surrounding rock strain value of each measuring point, the relative strain change rate of each measuring point relative to orifice measuring point is calculated;Step 3, the relative strain change rate is input into the PSO-XGBoost regression model trained in advance;Step 4, the PSO-XGBoost regression model outputs surrounding rock loose circle thickness value.The present application effectively solves the problems that the existing surrounding rock loose circle division method is highly subjective, has no uniform standard, and the sensing equipment has poor adaptability under the condition of deep large deformation, has significant technical progress and engineering application value.
Need to check novelty before this filing date? Find Prior Art