A coal mine roadway surrounding rock stability classification method and device

By constructing a comprehensive stability classification index, which combines ground stress, surrounding rock mechanical parameters, and the range of the plastic zone, the problem of insufficient accuracy in the classification of coal mine roadway surrounding rock in existing technologies has been solved. This has enabled refined classification of roadway surrounding rock stability and scientific support design, thereby improving mine safety and economic benefits.

CN122153681APending Publication Date: 2026-06-05山西华阳集团新能股份有限公司 +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
山西华阳集团新能股份有限公司
Filing Date
2026-01-13
Publication Date
2026-06-05

AI Technical Summary

Technical Problem

Existing methods for classifying surrounding rock in coal mine roadways fail to effectively combine the geostress environment, the inherent properties of the surrounding rock, and its mechanical response. This results in significant discrepancies between the classification results and actual stability under complex geological conditions, leading to inaccurate support designs, potentially wasting costs or posing safety hazards.

Method used

By quantitatively coupling analysis of ground stress, surrounding rock mechanical parameters, and plastic zone range, a comprehensive stability classification index is constructed, including stress intensity ratio, plastic zone control coefficient, and stress direction correction coefficient. This enables refined and quantitative classification of roadway surrounding rock stability, providing a basis for differentiated support design.

Benefits of technology

It improves the accuracy and objectivity of the classification of surrounding rock stability in coal mine roadways, reduces the subjectivity of human experience judgment, provides a scientific and precise basis for support design, and enhances mine safety and economic benefits.

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Abstract

The application provides a coal mine roadway surrounding rock stability classification method and device, comprising, obtaining the original rock ground stress field data of a target roadway area, including the size and direction of the maximum horizontal principal stress, the minimum horizontal principal stress and the vertical stress; determining the mechanical parameters of the target roadway surrounding rock, the mechanical parameters including the uniaxial compressive strength, the cohesion and the internal friction angle; calculating the plastic zone range of the roadway surrounding rock based on the original rock ground stress field data and the mechanical parameters of the surrounding rock; constructing a comprehensive stability classification index, the index being formed by the product coupling of the stress intensity ratio, the plastic zone control coefficient and the stress direction correction coefficient; dividing the roadway surrounding rock into five stability levels according to the numerical range of the comprehensive stability classification index, and matching the corresponding support form and parameters based on the surrounding rock state characteristics corresponding to each level. The application can improve the accuracy and objectivity of the surrounding rock stability classification, and provide a scientific basis for the differentiated support design of the coal mine roadway.
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