DEHYDRATION METHOD OF MINERAL DEPOSIT Russian patent published in 2012 - IPC E02D19/06 E21F16/00 

FIELD: mining.

SUBSTANCE: method involves collection of underground water to manifold (17) around development zone (26) of ore (8) deposit (7) so that cone of depression (27) is formed owing to operation of rings (14) of upward discharge wells (15) drilled out of drain annular mine working (6). Inflow is supplied from manifold (17) of mine working (6) by gravity via pipeline (18) of development mine working (4) to sump (19) of well shaft (1) for cleaning and accumulation. Then, some part (28) of accumulated inflow is supplied by means of pump (22) of well water drainage via pipeline (21) to surface (9) into closed pipeline (20), and from it to water bearing horizon (3) through pumping wells (10) pre-drilled from surface (9) within cone of depression (27), thus providing such pumping mode that pumping flow rate Q₃ is less than pumping-out flow rate Q₀, and heads H₃ of underground water in the propagation area of pumped water are less than heads H₀ out of this area, i.e. they provide the compliance with conditions Q₃<Q₀ and H₃<H₀.

EFFECT: providing environmentally safe utilisation of technogenic drainage water.

1 ex, 6 dwg, 1 tbl