METHOD OF SLUDGE PITS RECLAMATION WITHOUT THEIR BACKFILLING ON FOREST FUND TERRITORY OF RUSSIAN FEDERATION IN MIDDLE TAIGA SUBZONE OF WESTERN SIBERIA Russian patent published in 2017 - IPC E21C41/32 E02D17/20 

FIELD: construction.

SUBSTANCE: method comprises arranging the sectional sludge pit with the double bonding, waterproofing the sludge pit walls and bottom, placing the drilling waste, pumping out the liquid phase followed by planting plants. Moreover, the sludge pit is divided into sections by jumpers of the trapezoidal shape, around the pit perimeter (except for the drilling rig side) the impervious trench is arranged, into which waterproofing film is laid, with the subsequent backfilling with soil and erecting the perimeter bonding with the height of at least 1.0 m above the sludge pit filling level, the sludge pit bottom and walls are insulated by clay solution with the thickness of not less than 0.1 m; drilling waste of the hazard class no higher than IV is placed in the sludge pit, the drilling waste surface in the sludge pit is not backfilled, but remains open to the ultraviolet sun radiation and air oxygen impact on the drilling waste. After the liquid phase clarification and the drilling waste consolidation, the liquid phase is pumped out, willow cuttings are planted on the shelves, bonding slopes and intersectional jumpers, cattail is planted on the water edge.

EFFECT: increased sludge pits reclamation efficiency.

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