METHOD FOR DREDGE WORK OF PLACER DEPOSITS Russian patent published in 2017 - IPC E21C41/30 

FIELD: mining.

SUBSTANCE: method involves stripping in the contours of industrial reserves, reducing the thickness of productive deposits by cutting them to a depth, sufficient to mine out the remaining part with the dredge, moving the cut off productive deposits into the trench and dredging the prepared stocks. In this case, the trench is formed on unproductive areas located along the travel of the dredge, and the cross-section area of the cut off rocks of productive deposits in the trench is established from the ratio of the volume of these deposits and the length of the unproductive area. And the trench is formed with a depth, which ensures placement of productive deposits with the maximum permissible thickness for the dredge with the minimum allowable width of the face.

EFFECT: increase the productivity of stripping and mining equipment by optimizing the parameters of the dredge, including by controlling the size of the sand bulks in the trench.

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