• A novel method combining gob-side entry driving (GSED) and directional roof-cutting enables efficient recovery of coal pillars under thick-hard roofs, improving resource recovery and safety.
• Optimal narrow coal pillar width (10 m) and working face length (65 m) were determined via theoretical analysis and numerical simulation, validated by field application.
• Pre-splitting of 8.2 m thick-hard roof using directional drilling and energy-gathering blasting ensures symmetrical roof collapse and reduces mine pressure hazards.
• Field observations confirm the effectiveness of the integrated approach, offering a practical reference for similar mining conditions.