METHOD FOR RECONSTRUCTION OF A FLOODED MINE MINED BY OPEN-UNDERGROUND METHOD Russian patent published in 2023 - IPC E21C41/00 E21F16/00 

FIELD: mining industry.

SUBSTANCE: invention can be used in development of flooded deposits of solid minerals, developed using the combined open-underground method, in particular when restoring an emergency flooded mine. The method includes reconstruction of a quarry with reconstruction of a quarry drainage, creation of a safety pillar in the quarry, pumping water from flooded underground workings, reconstructing the drainage system of wells from underground mine workings, finalizing the mine levels in the flooded zone in ascending order. Reconstruction of the quarry is carried out by spreading the boundary of the quarry with preliminary pumping of all types of water out of the quarry pit. The width of the spread of the quarry boundary is determined based on the width of the site for the placement of the quarry drainage berm. Reconstruction of the quarry drainage is carried out by forming a side waterproofed drainage ditch on the berm along the quarry perimeter and creating a sump. Drainage water is pumped out of flooded underground workings through flooded cage and skip shafts. Formation of levels of the mine in ascending order is carried out with preliminary sinking of drainage workings. The protective pillar is created in form of a frozen ice-rock mass or in form of a plugged mass based on debris and rocks collapsed during the reconstruction of the quarry. Reconstruction of the drainage system of wells from underground mine workings is carried out in the direction from the bottom up by creating boundaries of trial verification and prospecting/drainage wells with the possibility of subsequent monitoring of the state of the mass, while the well boundary is liquidated on the level after construction of wells of the next stage.

EFFECT: increase of reliability of the mine drainage system.

4 cl, 3 dwg