METHOD TO INCREASE STABILITY OF CEILING IN DOWNWARD SLICING DEVELOPMENT OF DEPOSIT WITH BACKFILLING

摘要

FIELD: mining.;SUBSTANCE: method to increase stability of a ceiling in downward slicing development of a deposit with backfilling includes serial tunnelling and backfilling of parallel mines - stope entries, leaving ore pillars with width equal to one, two or three spans of mines, backfilling of mines with a concrete mix, and after backfilling hardens, ore pillars left between concrete strips are mined. At the same time the vault of stope entries is arranged as deep, besides, ore pillars are left in the roof between concrete backfilling of adjacent stope entries.;EFFECT: higher stability of a mine ceiling.;4 dwg