METHOD FOR LIME PIT RECLAMATION Russian patent published in 2007 - IPC E21C41/32 

FIELD: methods of underground or surface mining, particularly reclamation of surface-mined areas after production of building stone and other surface-sited minerals.

SUBSTANCE: method involves developing open-pit field; caving hanging walls of the pit; forming floor; installing one-sided form and filling the created space with claydite-concrete; arranging heat-insulation and water-proofing screen along pit wall so that the screen extends for the full wall length, wherein the heat-insulation and water-proofing screen includes heat-insulation material combined with waterproofing sheets of surface waterproofing agent; erecting paired support walls provided with natural ventilation system along pit perimeter so that the support walls are spaced predetermined distance from pit wall; covering space between paired support walls and pit wall with surface waterproofing agent and filling the treated space with ice.

EFFECT: extended field of exhausted pit usage, for instance for further freezing facility construction.

3 cl, 1 dwg