Research on the Stability of Inter-Roadway Surrounding Rock in Spatially Intersected Roadways Under Dynamic Loading

Spatially intersecting roadways in mines are prone to stress concentration due to disturbances during mining operations, which significantly affects the stability of the inter-roadway surrounding rock between the roadways. Analyzing the stability of underlying roadways under the influence of disturbances from overlying roadways, as well as enhancing the stability of the inter-roadway surrounding rock, is critical for ensuring safe and efficient mining operations. Based on the geological conditions at the spatial intersection of the 5−1 Coal Auxiliary Transportation Roadway and the 5−2 Coal Auxiliary Transportation Roadway in the Hengliao Coal Mine, this study investigates the deformation and failure characteristics of the surrounding rock between roadways under dynamic loading. A stability criterion equation for the inter-roadway surrounding rock is established using the limit equilibrium method. Furthermore, numerical simulations are conducted to analyze the stress–strain distribution in the surrounding rock and supporting structures at the intersection area of the 5−1 roadway under the dynamic loading conditions induced by trackless rubber-tired vehicle operation in the 5−2 roadway. Field applications demonstrate that the proposed combined support scheme effectively controls roadway deformation and ensures the stability of the rock mass between roadways. This study provides valuable insights for stability assessment and support design of spatially intersecting roadways.