METHOD OF PITS CONSERVATION WITH FLOODING OF SELECTED AREA Russian patent published in 2012 - IPC E21C41/32 

FIELD: mining.

SUBSTANCE: method of pits conservation, including open-pit field mining, foundation pit with flattening of pit edges and their reinforcement along the periphery and pit flooding with water. Note that edges flattening is done till reaching the angle of safe cut. Along the lower flooded area of the edges along the whole periphery together with flattening of edges from sheared massive there formed is a retaining embankment till the mark corresponding the minimum water level in pit. After that the retaining embankment is covered by protective layer from macrofragmental material till the mark exceeding the maximum water level in pit to the height of wave run-up. Dumping of protective layer from macrofragmental material is done by segregation of consertal rocks as a result of mining-and-transport equipment unloading at the upper edge of the pit, the edges flattening till reaching the angle of natural slope is done above the minimum water level in pit.

EFFECT: increase of pit edges stability in the area of abrasion.

3 cl, 1 dwg