FIELD: mining. SUBSTANCE: when driving working, two leading zones of camouflet blasting of rocks are formed. One zone within design outline of working, and the other, beyond the design outline. Formed between two zones of blasted rocks is ring-shaped pillar. Working driving is carried out with use of light explosive charges that reduces intensity of seismic effect on rocks adjacent to zone outlines. EFFECT: higher efficiency. 2 dwg
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