FIELD: drilling and blasting operations in hard rocks, applicable in various branches using blasting operations in rock masses.
SUBSTANCE: the blast hole has a cylindrical shaft with the lower section filled with an explosive charge, and the upper section filled with a tamping material, in which a recess filled with the tamping material is made, the maximum diameter of the recess equals 1.5-3 diameters of the hole. The recess is made in the form of a truncated cone, which on the side of the larger base is filled with an explosive at least by 10% of the height.
EFFECT: provided effective breaking of rocks due to a multiple enhancement of the locking effect of tamping by increasing the quantity of the tamping material involved in motion from the recess.
2 dwg
| Title | Year | Author | Number |
|---|---|---|---|
| BLAST HOLE | 0 |
|
SU769296A1 |
| COMBINED CHARGING TAMPING OF WELLS | 2011 |
|
RU2462688C1 |
| FILL STEMMING OF BLAST HOLES WITH ELEMENTS OF STONE MATERIAL | 2013 |
|
RU2526950C1 |
| METHOD OF PRODUCTION OF THE MASS EXPLOSION AND THE MECHANISM FOR ITS REALIZATION | 2004 |
|
RU2291389C2 |
| FIRING METHOD OF THE BLASTHOLE CHARGES AND THE MECHANICAL DEVICE FOR THE METHOD REALIZATION | 2004 |
|
RU2291390C2 |
| COMBINATION CHARGING TAMPING | 2006 |
|
RU2307311C1 |
| COMBINATION STEMMING | 2006 |
|
RU2308674C1 |
| STEMMING MACHINE FOR FORMATION OF SHORT COMBINED STEMMING OF BLAST HOLES WITH STONE MATERIAL | 2015 |
|
RU2600474C1 |
| COMBINED ORGANIC PLUG | 2010 |
|
RU2439484C1 |
| METHOD OF THE MULTI-ROW BLASTING OF THE BOREHOLE CHARGES AND THE DEVICE FOR THE METHOD REALIZATION | 2004 |
|
RU2291388C2 |
