FIELD: mining industry.
SUBSTANCE: method includes drilling of cutting, ore-cutting, additional and contouring blast-holes with their later charging and detonation. Charging of contouring blast-holes is performed in two steps. First, blast-holes of dome portion are loaded by non-explosive destroying compound, and after detonation remaining blast-holes of pit-face are charged with explosive substance. Drilling of contouring blast-holes of dome portion is performed at distance of effective area of effect of force fields. Dome portion blast-holes drilling may be performed at distance from each one equal to 3-6 diameters of blast-holes.
EFFECT: lower laboriousness, simplified process of blast-holes charging, preventing effect of blast of contouring blast-holes of dome portion of mines, lower costs of operations.
2 cl, 3 dwg, t tbl, 1 ex
| Title | Year | Author | Number |
|---|---|---|---|
| METHOD FOR CONTOURING OF MINING WORKS AND DEVICE FOR ITS IMPLEMENTATION | 2015 |
|
RU2672704C2 |
| DRIVING OF MINE WORKINGS BY DRILLING AND BLASTING | 1989 |
|
SU1743255A1 |
| METHOD FOR DRIVING MINE WORKINGS | 1989 |
|
SU1748483A1 |
| METHOD OF DRIVING A HORIZONTAL MINE WORKING | 0 |
|
SU1751310A1 |
| METHOD OF PREVENTION OF ROCK AND GAS OUTBURSTS IN DRIVING OPENINGS | 0 |
|
SU1701938A1 |
| PROCESS OF DESTRUCTION OF ROCKS WITH DRIVING OF WORKING IN THEM | 1992 |
|
RU2006581C1 |
| METHOD OF EXCAVATING DEVELOPMENT WORKINGS AT EXCAVATION OF COAL SEAMS | 0 |
|
SU619651A1 |
| METHOD OF CUT-HOLE FORMATION | 2007 |
|
RU2366890C1 |
| METHOD FOR DRIVING UNDERGROUND WORKING CLOSE TO OUTBURST-RISKY ROCK MASS | 1992 |
|
RU2094613C1 |
| METHOD FOR DRIVING VERTICAL SHAFT | 2002 |
|
RU2229602C2 |
