Coal rock ejection intensity analysis method and device and electronic equipment

By analyzing the dynamic failure time and stress change characteristics of coal rock samples during pressure loading, and calculating dynamic time factors, the problem of unpredictable coal rock catapult phenomenon is solved, and the accuracy of early warning of dynamic disaster accidents is improved.

CN119666570AActive Publication Date: 2025-03-21CHINA COAL RES INST +2
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Patent Information

Application Number
CN202510186873.4
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-02-20
Publication Date
2025-03-21
Estimated Expiration
2045-02-20

AI Technical Summary

Technical Problem

During coal mining, the catapult phenomenon of coal rock is difficult to understand and predict in-depth, resulting in low warning accuracy for impact ground pressure accidents.

Method used

By obtaining the axial strain value, axial stress value and time data of coal rock samples during pressure loading, the dynamic failure time and the slope of the stress with the strain decline stage are calculated, and combined with the preset time factor calculation model, the dynamic time factor is obtained to reflect the intensity of coal rock ejection.

Benefits of technology

The quantitative and standardized assessment of the severity of coal-rock catapult dynamic disasters has been achieved, the accuracy of early warning of power disasters such as impact ground pressure has been improved, and safety protection has been taken in advance.

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Abstract

The invention provides a coal rock ejection intensity analysis method and device and electronic equipment, and the coal rock ejection intensity analysis method comprises the steps: obtaining an axial strain value, an axial stress value and time data of a coal rock sample in a pressure loading process, and then calculating to obtain the dynamic damage time of the coal rock sample; according to the axial stress values and the axial strain values corresponding to the axial stress values, the slope corresponding to each axial stress value in the stage that the axial stress decreases along with the axial strain is obtained; if the absolute values of the slopes of the multiple continuous axial stress values are all larger than or equal to a preset change threshold value, the change duration experienced by the continuous descent stage corresponding to the multiple axial stress values is recorded; and based on the time factor operation model, processing the dynamic damage time and the change duration to obtain a dynamic time factor. The method can quantitatively and standardly reflect the intensity of the catapulting dynamic disaster of the coal rock, and improves the early warning accuracy of dynamic disaster accidents such as rock burst and the like.
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