Breaking and mining-induced stress evolution of overlying strata in the working face of a steeply dipping coal seam

Abstract The breaking features and stress distribution of overlying strata in a steeply dipping coal seam (SDCS) differ significantly from those near-horizontal one. In this study, the laws governing evolution vertical release shear concentration seams with different dip angles are derived via numerical simulation, rock mechanics tests, acoustic emissions, field measurements. Thus, stress-driven dynamic structure, which arch forms, is determined. Upon lower part strata, transfers rapidly to upper working face. damaged zone migrates upward along direction gangue face compacted, leading an increase stress. As angle increases, fail suddenly under action stresses. Finally, behavioral response driven by stresses longwall SDCS identified analyzed detail. present research findings reveal behavior mine pressure SDCS, turn can be used establish respective on-site guidance.