Research on Optimization of Roadway Location in Close-Distance Coal Seam Mining

With the continuous exploitation of coal resources, close-distance coal seam mining has gradually become a crucial aspect in coal mine production. During close-distance coal seam mining, due to the small spacing between the upper and lower coal seams, the residual coal pillars and goaf areas left after the mining of the upper coal seam have a significant impact on the layout and stability of the roadways for mining the lower coal seam. Taking the 4203 working face of a certain coal mine as an example, this paper focuses on the optimization of roadway location in close-distance coal seam mining. Through a combination of theoretical analysis, numerical simulation, and on-site measurements, the paper investigates roadway layout schemes and determines a reasonable roadway position. The research findings indicate that adopting a staggered inward layout and determining an appropriate staggered distance can effectively avoid the influence of vertical stress above coal pillars and the vertical stress exerted by coal pillars on the floor roadway, thereby enhancing the stability and safety of the roadway.