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Innovative pillar recovery method integrating gob-side entry driving and directional roof-cutting for thick-hard roof coal seams https://journal.hep.com.cn/jocsu/EN/10.1007/s11771-025-6060-x
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Innovative pillar recovery method integrating gob-side entry driving and directional roof-cutting for thick-hard roof coal seams https://journal.hep.com.cn/jocsu/EN/10.1007/s11771-025-6060-x
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