Research on Mechanical Response Mechanisms of Interlayer Rock Strata in Closely Spaced Coal Seam Mining

Closely spaced coal seams holds significant importance in global energy development, as the mechanical response mechanism of interlayer rock strata directly governs roadway deformation and stress concentration levels. This study investigates the impact of bearing structures within interlayer strata on the stability of surrounding rock during closely spaced coal seams, elucidating their load‐mechanical response mechanism. Through a case study of Shicaocun Coal Mine, we systematically analyze spatial stress distribution characteristics and dynamic response patterns in interlayer strata, thereby proposing targeted strategies for stress regulation and roadway protection. Results demonstrate that when the stress concentration factor (SCF) increases from 1.21–1.86 to 3.14, the maximum pressure‐relief ratio of interlayer strata decreases from 71.4% to 28.6%. After implementing hydraulic fracturing technology for stress regulation, the support pressure interval in lower coal face increased from 19.7–22.6 to 24.8–29.1 m, while support working resistance during pressure periods decreased from 25.9–28.8 to 6.0–21.4 MPa, effectively suppressing high dynamic pressure manifestations. The findings enhance the theoretical framework of mine mechanics and provide both theoretical and empirical support for formulating pressure relief strategies in closely spaced coal seams.