FIELD: mining industry. SUBSTANCE: before main borehole drilling they preliminary drill experimental boreholes, determine distribution of their zones of absorption and absorptions frequency dependences on depth. Opening of productive deposits in main borehole is exercised taking account of expenses for removal of absorption and the dependances. EFFECT: method is used in mining industry. 1 dwg
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Authors
Dates
1995-07-09—Published
1990-12-25—Filed