Coal rock dynamic permeability detection method and system

By using a path structure probabilistic modeling method, the problem of insufficient accuracy in coal and rock permeability detection under complex stress conditions in existing technologies is solved. This enables high-precision identification of the dynamic changes in seepage structures and improves the structural consistency and stability of permeability detection.

CN121994679BActive Publication Date: 2026-06-23ORDOS HAOHUA CLEAN COAL CO LTD
View PDF 2 Cites 0 Cited by

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
ORDOS HAOHUA CLEAN COAL CO LTD
Filing Date
2026-04-02
Publication Date
2026-06-23

AI Technical Summary

Technical Problem

Existing methods for detecting coal and rock permeability are insufficient to accurately reflect the dynamic changes in seepage structures under complex stress conditions, and they neglect the process of seepage path structure reconstruction and channel concentration behavior, resulting in insufficient accuracy in permeability change identification.

Method used

The path structure probabilistic modeling method is adopted. By synchronously collecting seepage response data, the correspondence between pressure difference sequence and flow rate sequence is constructed, a set of seepage path nodes is generated, and the path transmission contribution value is calculated to form a seepage path probability field and topological structure matrix. Combined with the topological entropy change rate sequence, the dynamic permeability sequence of coal and rock is generated.

Benefits of technology

It achieves high-precision detection of coal and rock permeability under complex loading conditions, can reflect the evolution law of seepage structure, improves the structural consistency and stability of permeability identification, and has a sensitive response to fracture propagation and channel concentration behavior.

✦ Generated by Eureka AI based on patent content.

Smart Images

  • Figure CN121994679B_ABST
    Figure CN121994679B_ABST
Patent Text Reader

Abstract

The application discloses a coal rock dynamic permeability detection method and system, comprising the following steps: collecting seepage response data in the process of stress disturbance or loading evolution of a coal rock sample, and performing pretreatment; constructing a pressure difference sequence, generating a seepage response state set; constructing a seepage path node set, establishing a path connection relationship set; calculating the path transmission contribution value of each seepage path, forming a seepage path probability field; constructing a path topological structure matrix according to the seepage path probability field, and calculating a path concentration index sequence; calculating a topological entropy sequence and a topological entropy change rate sequence; inputting the topological entropy sequence, the topological entropy change rate sequence and the path concentration index sequence into a permeability structure mapping model to generate a coal rock dynamic permeability detection result. The application adopts a path structure probability modeling method, realizes coal rock dynamic permeability detection, and has the advantages of strong structure sensitivity and high detection precision.
Need to check novelty before this filing date? Find Prior Art