FIELD: blasting.
SUBSTANCE: hole charging is performed with the dispersal of charges to the main and intermediate charges. In this case, the main charge is placed on the bottom of the well in four arms arranged mutually perpendicular to each other. Between the horizontal charges, air gaps are formed, and a locking plug is installed at the wellhead. An additional charge of blasting explosive is placed in the borehole at a distance equal to half height of the ledge, and the remaining space of the well is covered with basting material. The invention makes it possible to increase the efficiency of drilling-and-blasting breakage. A significant reduction in the specific consumption of the explosive on 1m3 of rocks, rock output from 1 p.m of the well, drilling volumes.
EFFECT: quality of toe reaming improved.
1 tbl, 3 dwg
| Title | Year | Author | Number |
|---|---|---|---|
| METHOD OF DRILLING AND BLASTING WORKS IN FRACTURED ROCKS | 2016 |
|
RU2646887C1 |
| METHOD FOR BREAKING OF KIMBERLITIC ROCKS | 2006 |
|
RU2311609C1 |
| METHOD FOR BLASTING OF ROCKS IN OPEN PITS | 2008 |
|
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| CHARGING SHAPING UNIVERSAL HOSE | 2024 |
|
RU2823362C1 |
| METHOD OF BLASTING OF ROCK MASS | 2011 |
|
RU2475698C2 |
| DRILLING AND BLASTING OPERATIONS AT OPEN PITS | 2013 |
|
RU2517289C1 |
| METHOD OF EXPLOSIVE PREPARATION FOR SELECTIVE EXCAVATION OF ORE BODY AND COVERING OVERBURDEN ROCKS | 2020 |
|
RU2738331C1 |
| METHOD FOR ROCK-BLASTING AT OPEN-PIT MINING | 2003 |
|
RU2244252C1 |
| METHOD FOR EXPLOSIVE DESTRUCTION OF VARIOUS COHERENCE ROCK MASSIF WITH DISTRIBUTED AND SHORTENED BLASTHOLE CHARGES WITH CUMULATIVE EFFECT | 2015 |
|
RU2594236C1 |
| METHOD FOR DEVELOPMENT OF ROCKS IN OPEN PIT RECONSTRUCTION | 2009 |
|
RU2395688C1 |
