FIELD: mining.
SUBSTANCE: invention relates to the field of mining and blasting, in particular, to drilling, more precisely, to methods of expansion of small-diameter wells and can be used in performance of works in complex mining conditions. Method of well expansion includes drilling of pilot central well, drilling of additional wells around it, arrangement of explosive charges in additional wells and their blasting. Mass of explosive charges in each additional well is selected so that their explosion causes cracking along the line "pilot well - additional well" without destruction of rock. Explosive charge is placed in the pilot central well and explosive substance is blasted in it, then the well is cleaned from the formed pieces of rock and dust particles.
EFFECT: enabling expansion of the well to the specified diameter in cramped conditions without drilling equipment and with provision of its functional purpose.
3 cl, 2 dwg
| Title | Year | Author | Number |
|---|---|---|---|
| METHOD FOR DETERMINING KNOCK ATTENUATION | 2020 |
|
RU2748830C1 |
| EXPLODING DEVICE FOR FORMING HORIZONTAL UNDERGROUND HOLLOWS AND METHOD FOR PERFORMING EXPLODING OPERATIONS WITH USE OF SAID DEVICE | 2001 |
|
RU2254453C2 |
| DEEP-HOLE CHARGE | 1993 |
|
RU2069836C1 |
| METHOD OF WATER REDUCTION AT EXPLOSIVE PREPARATION TO EXTRACTION OF WATERED MASSIF | 2018 |
|
RU2685722C1 |
| METHOD OF HYDRAULIC BOREHOLE MINING IN HARD ROCKS | 1998 |
|
RU2150002C1 |
| METHOD FOR BLASTING DIFFERENT-STRENGTH ROCK MASSES IN THE PERMAFROST ZONE | 2022 |
|
RU2775124C1 |
| METHOD FOR DEGASSING OF COAL BEDS | 2008 |
|
RU2383741C1 |
| METHOD FOR DRIVING RAISES | 0 |
|
SU1802139A1 |
| METHOD FOR FORMATION OF WATER-PROOF EXPLOSIVE CHARGE IN ENTRY FOR ORE-BREAKING | 2001 |
|
RU2210055C2 |
| METHOD FOR FORMATION OF CHARGE IN WELL COMBINED OPEN-UNDERGROUND MINING | 2019 |
|
RU2725721C1 |
