Research on the stability of support structures in steeply dipping coal seam working face

Abstract

Abstract Stability control of overlying strata and support equipment in steeply inclined coal seam faces poses a significant challenge in mining operations. The implementation of curved face layouts has been proven effective in enhancing support stability. This study establishes mechanical models for both sliding and toppling instability of supports in steeply inclined faces. Critical stability equations are derived under optimal roof-contact conditions, and the minimum yield resistance required to maintain stable configurations in both inclined straight and curved face sections is determined. Theoretical analysis demonstrates that curved face geometries improve the stress distribution of lower-face supports. Field monitoring validate the practical efficacy of this approach. These findings provide valuable guidance for safe and efficient mining under similar geological conditions.