FIELD: blasting.
SUBSTANCE: method of blast-hole drilling ensuring preset extent of blast rock grinding includes drilling of explosive wells at the distance between them, depending on detonating characteristics of explosives, physical and technical properties of a rock massif, parameters of its cracking, their charging and explosion. Explosive wells are charged with explosives with specific consumption per m3 of blast rock in amount determined with account of explosive energy losses as charge explosion products expand in a well volume occupied with the charge, and also with account of losses related to the extent of the specific explosive detonation completeness in the well of the specific diameter, which are introduced into a calculation expression for a coefficient of relative operability of the applied explosive.
EFFECT: reduced volume of drilling works in drilling of explosive wells, which results in higher efficiency and reduced cost of blast-hole drilling.
3 tbl
| Title | Year | Author | Number |
|---|---|---|---|
| METHOD FOR OBTAINING THE PRESET DEGREE OF CRUSHING OF CRUMBLING ROCK MASS BY A BLAST | 2003 |
|
RU2239784C1 |
| DRILLING AND BLASTING OPERATIONS AT OPEN PITS | 2013 |
|
RU2517289C1 |
| METHOD FOR CONDUCTING OF DRILLING AND BLASTING OPERATIONS | 2004 |
|
RU2290597C2 |
| DRILLING-AND-BLASTING METHOD OF MINE WORKINGS IN STRESSED FRACTURED ROCK MASSES | 2011 |
|
RU2502045C2 |
| METHOD FOR SHOOTING OF ORES AND ROCKS ON UNDERGROUND MINING WORKS | 2011 |
|
RU2476819C1 |
| METHOD FOR ROCK-BLASTING AT OPEN-PIT MINING | 2003 |
|
RU2244252C1 |
| PROCESS OF BREAKING OF ROCKS ON EARTH SURFACE BY BLAST | 1995 |
|
RU2095746C1 |
| METHOD FOR BREAKING OF KIMBERLITIC ROCKS | 2006 |
|
RU2311609C1 |
| METHOD FOR DEVELOPMENT OF ROCKS IN OPEN PIT RECONSTRUCTION | 2009 |
|
RU2395688C1 |
| 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 |
