FIELD: mining industry, underground and open geotechnology, blasting of crumbling rocks for obtaining the preset degree of crushing.
SUBSTANCE: holes in the crumbling rock mass are drilled, charged and slow-down blasted. The distance between the holes in a group and between the groups of holes is determined depending on their diameter, detonation characteristics of the explosive, physico-technical properties of the rock mass, parameters of its jointing, dimension of the conditional lump, value of the rock pressure and the friction coefficient. The holes in a group are located at a definite distance and the required distances between the hole group provide for obtaining the preset degree of crushing of crumbling rock masses.
EFFECT: enhanced efficiency of capacity of mining.
1 tbl, 2 ex
| Title | Year | Author | Number |
|---|---|---|---|
| METHOD FOR OBTAINING THE PRESET DEGREE OF CRUSHING OF CRUMBLING ROCK MASS BY A BLAST | 2003 |
|
RU2239784C1 |
| ORE BODY MINING METHOD | 2016 |
|
RU2618541C1 |
| DRILLING-AND-BLASTING METHOD OF MINE WORKINGS IN STRESSED FRACTURED ROCK MASSES | 2011 |
|
RU2502045C2 |
| METHOD FOR DRIVING OF RAISES WITH ROCK BREAKING BY DEEP-HOLE CHARGES | 2003 |
|
RU2271513C2 |
| METHOD OF OBTAINING DETERMINED DEGREE OF CRACKING OF A CRACKY STRESSED ROCK MASSIF IN EXPLOSION OF POWER CHARGES IN TWO PARALLEL CONTIGUOUS WELLS | 2016 |
|
RU2627349C1 |
| METHOD FOR PREPARATION OF ROCK MASS BY BLASTING FOR LEACHING IN SQUEEZED MEDIUM | 1991 |
|
RU2039248C1 |
| METHOD OF UNLOADING OF OUTBURST-PRONE ROCK MASS REGIONS BY BLASTING | 2001 |
|
RU2210671C2 |
| METHOD OF BLASTING ROCK | 2015 |
|
RU2584167C1 |
| METHOD FOR OBTAINING A PRESET CRUSHING RATIO OF FISSURED MOUNTAIN MASS AND THE REQUIRED COEFFICIENT OF HEADING ADVANCE PER ROUND TO SHOT HOLES LENGTH RATIO | 2010 |
|
RU2442957C2 |
| METHOD OF CUT-HOLE FORMATION | 2007 |
|
RU2366891C1 |
