FIELD: mining.
SUBSTANCE: invention relates to mining industry and can be used in dredging of thawed placers. Method includes removal of dead ground from dredging site, digging of drainage trench, pre-dredging of sand layer, removal of boulders, flooding and dredging of sands. Pre-dredging is performed over the uncovered area through sand blading by backhoe excavator, which draws transverse juds in travelling trench.
EFFECT: improved dredger performance, reduced loss of mineral in the soil, and lower unit costs of dredging of hard-dredging placers.
2 cl, 2 dwg
| Title | Year | Author | Number |
|---|---|---|---|
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