FIELD: mining. SUBSTANCE: method includes simultaneous operation of two chambers round the drilling-in holes. In this case, mined bulk is withdrawn from one chamber, tailings are separated and placed in worked-out space of the other chamber. Two hydraulic giants are operated simultaneously. EFFECT: higher efficiency. 2 cl, 2 dwg
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Authors
Dates
1997-11-27—Published
1995-09-07—Filed