METHOD FOR ERECTION OF UNDERGROUND IMPENETRABLE CURTAIN Russian patent published in 2009 - IPC E21F17/00 E02D31/00 

FIELD: mining.

SUBSTANCE: invention is related to mining, in particular to control of underground water reserves by creation of water-impermeable curtain (barrage) and to provision for reduction of underground drainage beyond the limits of curtain, to protection of environment against spreading of anthropogenic process in underground conditions, to construction in case of underground structures protection. Method for erection of underground impenetrable curtain includes tunneling of vertical shaft, drilling of horizontal wells from it, injection of strengthening and hardening solutions in them. In zone of necessary crossing of waterbearing formation or near underground anthropogenic process, vertical shafts are additionally erected, connected to each other by rows of horizontal wells, which are installed in vertical plane one above another, then, injecting hardening solution in them, underground impenetrable curtain is formed, which covers waterbearing formation from upper to lower confining layer or zone of underground anthropogenic process spreading. Curtain is made of two, three and more vertical rows of wells.

EFFECT: produced curtain, which covers only thickness of waterbearing formation in underground conditions, but not depth from day surface to the lower confining layer, makes it possible to reduce material expenses, to decrease labour intensity of curtain making, to reduce terms required for curtain erection, and also to expand zone of this curtain applicability.

6 dwg, 2 cl