FIELD: coal mining industry. SUBSTANCE: method implies under-level hydraulic mining of coal in descending order from winning drifts. Flexible roofing is installed in ventilation drift and repositioned according to mining out lower lying sub-levels and is dismantled in collecting drift. Flexible roofing is assembled of separate support sections of supporting - guarding type interconnected to each other by flexible link. EFFECT: high efficiency. 4 dwg
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