A method for quantitatively characterizing the distribution evolution law of overburden rock mining cracks in loess gully region based on fractal theory

By combining fractal theory with physical and numerical simulation methods, the distribution pattern of mining-induced fractures in the overburden of the Loess Gully Area was quantitatively analyzed. This solved the problems of overburden instability and the complexity of mining-induced fractures, enabling the evaluation and prevention of overburden damage and ensuring the safe and green mining of coal resources.

CN122172330APending Publication Date: 2026-06-09SHENHUA BAOTOU ENERGY CO LTD +1
View PDF 0 Cites 0 Cited by

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
SHENHUA BAOTOU ENERGY CO LTD
Filing Date
2024-12-09
Publication Date
2026-06-09

AI Technical Summary

Technical Problem

Coal mining in the Loess Gully region leads to the instability and movement of the overlying strata, generating a large number of mining-induced fractures, which affect the ecological environment and safety. Furthermore, the coupling effect between the mining-induced stress field and the fracture field of the overlying strata is complex, and existing technologies cannot quantitatively describe its distribution pattern.

Method used

Using a fractal theory-based approach, combined with physical similarity simulation and numerical simulation, a model of overburden mining-induced fracture distribution was established using measuring instruments and numerical simulation software. The overburden was divided into three regions, the fractal dimension was statistically analyzed, and the distribution and evolution of overburden mining-induced fractures were quantitatively investigated.

Benefits of technology

It enables a quantitative description of the distribution pattern of mining-induced fractures in overburden, reveals the law of overburden movement and damage, improves the evaluation and prevention capabilities of mining-induced overburden damage, and ensures the safe and green mining of coal resources.

✦ Generated by Eureka AI based on patent content.

Smart Images

  • Figure CN122172330A_ABST
    Figure CN122172330A_ABST
Patent Text Reader

Abstract

This invention relates to the field of quantitative analysis of mining-induced fracture evolution in coal and rock masses, and particularly to a method for quantitatively characterizing the distribution and evolution of mining-induced fractures in overburden in loess gully areas based on fractal theory. The method involves measuring data from the 6102 face of the Chuancaogedan Coal Mine using a measuring instrument, and then establishing a physical similarity simulation model based on the 6102 working face. Simulated excavation is performed, with the simulation data set as follows: 5# coal seam mining height 4.6m, excavation step distance 10m, model recovery length 220m; 6# coal seam mining height 12.9m, excavation step distance 10m, model recovery length 220m. Based on the results of the physical similarity simulation experiment and fractal theory, this invention systematically studies and quantitatively describes the distribution and evolution of mining-induced fractures in overburden under multiple influences in loess gully areas. This has significant theoretical and engineering implications for revealing the laws governing overburden movement and damage, achieving quantitative evaluation of the degree of overburden damage during mining, and preventing damage during working face mining.
Need to check novelty before this filing date? Find Prior Art