FIELD: mining.
SUBSTANCE: invention concerns mining and can be applied in dragging of tiered gravel deposits. The method involves combined dragging of valley placer tier together with bench and bench hillside placer sands, which are developed, shifted and laid by earth-moving machines to a surface of valley placer tier prepared for dragging in advance.
EFFECT: higher degree of deposit development.
2 dwg
| Title | Year | Author | Number |
|---|---|---|---|
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|
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|
RU2345224C1 |
| DREDGER | 0 |
|
SU1765304A1 |
