Deformation uniformity coefficient-based evaluation method for overall stability of underground surrounding rock

By using an evaluation method based on the deformation uniformity coefficient, a three-dimensional geological model was established using FLAC3D software to calculate the deformation release rate and envelope area of ​​the surrounding rock under different excavation sequences. This solved the problem that the influence of the excavation path was not considered in the existing technology, and achieved a more accurate evaluation of the surrounding rock stability and optimization of the mining sequence.

WO2026123649A1 Publication Date: 2026-06-18ANSTEEL GROUP MINING CO LTD +1
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Patent Information

Authority / Receiving Office
WO · WO
Patent Type
Applications
Current Assignee / Owner
ANSTEEL GROUP MINING CO LTD
Filing Date
2025-06-27
Publication Date
2026-06-18

AI Technical Summary

⚠Technical Problem

Existing technologies fail to effectively consider the impact of excavation path on rock deformation when evaluating the stability of underground surrounding rock, resulting in inaccurate evaluation results and difficulty in optimizing the mining sequence.

⚗Method used

An evaluation method based on the deformation uniformity coefficient was adopted. A three-dimensional geological model was established using FLAC3D software to calculate the deformation release rate and envelope area of ​​the surrounding rock under different excavation sequences, and the global deformation uniformity coefficient was calculated to evaluate the stability of the surrounding rock.

🎯Benefits of technology

It improves the accuracy and operability of surrounding rock stability assessment, optimizes the excavation sequence, and ensures the uniform release and stability of surrounding rock deformation.

✦ Generated by Eureka AI based on patent content.

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Abstract

The present invention provides a deformation uniformity coefficient-based evaluation method for the overall stability of underground surrounding rock, comprising the following steps: S1, establishing a three-dimensional geological model of an engineering region, and obtaining deformation release rate diagrams of nodes in surrounding rock under different excavation sequences by means of numerical simulation calculation; S2, calculating deformation uniformity coefficients of the nodes on the basis of envelope areas; S3, denoting a global deformation uniformity coefficient, and evaluating the stability of the surrounding rock on the basis of the global deformation uniformity coefficient; and S4, changing excavation sequences on the basis of a design scheme, repeating steps S1-S3 to obtain global deformation uniformity coefficients under the excavation sequences, and on the basis of numerical values and ranking of the global deformation uniformity coefficients, an excavation scheme which has the maximum deformation uniformity coefficient exhibiting the optimal surrounding rock stability. The present invention considers the influence of the excavation sequences on deformation paths and provides the deformation uniformity coefficient-based evaluation method for the stability of the surrounding rock, and the method can improve the accuracy and reliability of numerical calculation results for scheme optimization.
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