Research on gas migration law of Y-shaped ventilation in gob-side entry retaining based on Fluent simulation
Yang Yang
Abstract：The combination of gob-side entry retaining technology and Y-shaped ventilation mode has been widely practiced in coal mining field.The"two intake and one return"working face and the goaf tail roadway area often face the challenge of gas accumulation.When the gas concentration exceeds the safety threshold,it will increase the risk of accidents such as gas explosions.In order to improve the gas control effect in coal mines,the No.81118 working face of Wenjiazhuang Coal Mine in Shanxi Province was taken as the re-search object.Fluent simulation software was used to construct a mathematical model,and the basic laws of gas migration and diffusion under the Y-shaped ventilation mode of goaf were analyzed.The influence mechanism of different ventilation conditions on the spatial distribution pattern of gas concentration was expounded.The results show that the optimal air volume ratio of 2∶3 between the transpor-tation roadway and auxiliary transportation roadway has the best effect,which can ensure the safety of working face while achieving ef-fective management of gas in gob-side entry retaining area.
Keywords：Y-shaped ventilationgas migration lawair volume control
Publication Date：2025-10-30
Online Publishing Date：2025-11-27(First online date of this platform, not the publication date of the document)
Pages：5( 151-155 )