FIELD: mining.
SUBSTANCE: after performance of drilling and blasting operations in an overburden bench during layer-by-layer excavation of the blasted rock to an extended bench and a final blade circuit on the formation roof of the mineral deposit within excavation heading throughout the length of the slab there left is a layer of the rock with negative temperature. This allows developing a zone of stable freezing, warming it up and strengthening it by action of solar insolation during development of the upper part of the breakdown. The rest rock layer is excavated to a final blade circuit after disposal of the upper part of breakdown throughout the length of the excavation slab.
EFFECT: reduction of influence of repeated freezing on productivity of a drag line and provision of its stable operation during excavation of blasted rocks of an overburden slab.
3 tbl, 2 dwg
| Title | Year | Author | Number |
|---|---|---|---|
| METHOD FOR EXTRACTING STRIPPING ROCK | 2005 |
|
RU2299985C2 |
| METHOD OF OVERBURDEN EXCAVATION | 0 |
|
SU1624152A1 |
| OVERBURDEN DEVELOPMENT METHOD | 2014 |
|
RU2563517C1 |
| OPENCAST MINING METHOD FOR HORIZONTAL AND GENTLY PITCHING DEPOSITS | 0 |
|
SU1740671A1 |
| METHOD OF STRIP MINING OF HORIZONTAL AND GENTLY-SLOPING BEDS OF MINERALS | 0 |
|
SU960437A1 |
| STRIP MINING OF MINERALS INCLUDING WORKING OF ORE BODIES IN CONTACT BETWEEN ORE AND CAPPING IN SUB-BENCHES | 2013 |
|
RU2524716C1 |
| METHOD OF STRIP MINING OF MINERALS | 0 |
|
SU1285151A1 |
| METHOD FOR OPENCAST MINING BLANKET DEPOSITS | 2002 |
|
RU2235205C2 |
| METHOD OF PREPARATION OF NEW HAULAGE LEVEL AND EXCAVATOR-RAILWAY COMPLEX FOR METHOD EMBODIMENT | 2000 |
|
RU2186982C1 |
| METHOD OF TRANSPORT-FREE MINING OF SLOPING BED DEPOSITS | 0 |
|
SU1289989A1 |
