FIELD: mining art, in particular, blast methods for mine workings. SUBSTANCE: drilling of mapping blast-holes is accomplished, mapping blast-holes are charged with explosive with placement of indicators in the blast-hole, and the blast-holes are tamped with polyethylene ampoules with a powdered or liquid substance with components absorbing NO,NO2. A charge of ammonium nitrate is used as explosive. Pneumocharging of mapping blast- holes is carried out. EFFECT: enhanced efficiency due to simplified procedure and reduced cost of operations, enhanced safety due to refusal from special constructions or special types of explosive. 2 cl
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Authors
Dates
2000-10-27—Published
1999-03-31—Filed