, where S - drilled area of mining section, sq.m, charges in holes are calculated and grouped in rows, and blast network is mounted. EFFECT: simultaneous accomplishment of technologically rational and earthquake safe blasts near guarded objects with an increase of the volume of the blasted mass and decrease of the quantity of charge holes. 2 dwg"/>
公开/公告号RU2139490C1
专利类型
公开/公告日1999-10-10
原文格式PDF
申请/专利号RU19980106881
发明设计人 SHUJFER M.I.;
申请日1998-04-09
分类号F42D3/00;F42D5/00;
国家 RU
入库时间 2022-08-22 02:13:38