FIELD: mining industry, open and underground geotechnology, blasting of crumbling rocks.
SUBSTANCE: groups of holes in the crumbling rock mass are drilled, charged and blasted. The value of the uncharged part of each hole is determined mathematically depending on its diameter, detonation characteristics of the explosive, physico-technical properties of the rock mass cleavages, parameters of it jointing, friction coefficient between the rock mass cleavages, dimension of the conditional lump and the effect of engagement of adjacent explosive charges.
EFFECT: provided the preset degree of crushing of the crumbling rock mass by a blast due to production of an uncharged part of a definite length in the deep-hole (blast-hole) charge.
1 tbl, 1 ex
| Title | Year | Author | Number |
|---|---|---|---|
| METHOD OF DETONATION IN OPEN-CAST MININGS OF ROCK MASSES WITH DIFFERENT STRENGTH VALUES | 2014 |
|
RU2563893C1 |
| METHOD FOR BREAKING OF KIMBERLITIC ROCKS | 2006 |
|
RU2311609C1 |
| METHOD FOR OBTAINING THE PRESET DEGREE OF CRUSHING OF CRUMBLING ROCK MASS AT GROUP BLASTING OF DEEP-HOLE EXPLOSIVE CHARGES | 2002 |
|
RU2239783C2 |
| METHOD OF SHOOTING OF ROCKS WITH FROZEN EARTH SPOTS | 2004 |
|
RU2263877C1 |
| METHOD FOR TAMPING OF BLAST DOWN HOLES IN SINGLE BLASTS IN OPENCAST MINES | 2007 |
|
RU2350897C1 |
| METHOD FOR EXPLOSION OF ROCKS WITH SOLID INCLUSIONS | 2010 |
|
RU2443970C1 |
| METHOD OF BLAST-HOLE DRILLING ENSURING PRESET EXTENT OF BLAST ROCK GRINDING | 2010 |
|
RU2450242C1 |
| MINERAL RESOURCES OPEN DEVELOPMENT METHOD | 2010 |
|
RU2421617C1 |
| ROCK PREPARATION METHOD BY EXPLOSION | 2019 |
|
RU2735403C1 |
| DRILLING AND BLASTING OPERATIONS AT OPEN PITS | 2013 |
|
RU2517289C1 |
