Characteristics of overburden fracture conductivity in the shallow buried close coal seam group and its effect on low-oxygen phenomena DOI
Yunpei Liang, S. H. Zhu, Qican Ran

et al.

Physics of Fluids, Journal Year: 2025, Volume and Issue: 37(4)

Published: April 1, 2025

The distribution and conduction properties of overburden fractures following coal extraction beneath a shallowly buried, proximate seam group are extremely complex. These primary source air leakage within the mining zone contribute to oxygen-deficient conditions at working face. Therefore, in this study, physical similarity simulation experiments used quantitatively analyze conductivity characteristics during shallow buried close group. results show that with increase distance, high level area mainly forms breakage fracture, its fracture aperture increases significantly, penetration is enhanced. low gradually generates delamination connects constituting three-dimensional gas channel between face, upper area, ground surface. Moreover, changes frequency, angle, have significant effect on transportation circulation low-oxygen gas; frequency increases, density angle range becomes bigger, which provides “hotbed” for enriched storage gas. This study scientific basis prevention control safe production mines helps protect life safety miners.

Language: Английский

Characteristics of overburden fracture conductivity in the shallow buried close coal seam group and its effect on low-oxygen phenomena DOI
Yunpei Liang, S. H. Zhu, Qican Ran

et al.

Physics of Fluids, Journal Year: 2025, Volume and Issue: 37(4)

Published: April 1, 2025

The distribution and conduction properties of overburden fractures following coal extraction beneath a shallowly buried, proximate seam group are extremely complex. These primary source air leakage within the mining zone contribute to oxygen-deficient conditions at working face. Therefore, in this study, physical similarity simulation experiments used quantitatively analyze conductivity characteristics during shallow buried close group. results show that with increase distance, high level area mainly forms breakage fracture, its fracture aperture increases significantly, penetration is enhanced. low gradually generates delamination connects constituting three-dimensional gas channel between face, upper area, ground surface. Moreover, changes frequency, angle, have significant effect on transportation circulation low-oxygen gas; frequency increases, density angle range becomes bigger, which provides “hotbed” for enriched storage gas. This study scientific basis prevention control safe production mines helps protect life safety miners.

Language: Английский

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