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aluminosilicates (1)
artificial massif (1)
atmosphere pollution (1)
auger mining, thin coal seam, protecting pillars, interwell pillar, stress, drilled well, geomechanical model (1)
backfill mixture; backfill massif; underground cavity; mineral composition; compressive strength; microstructure; hydrated calcium silicates (1)
backfill mixture; dump rocks, strength, utilization (1)
backfilling mixture (1)
backfilling of workings space (1)
blasting (1)
block leaching (1)