CONSTRUCTION METHOD OF UNDERGROUND STORAGE TANK IN ROCKY SOILS Russian patent published in 2011 - IPC E21D13/00 E21F17/16 B65G5/00 

FIELD: mining.

SUBSTANCE: method involves drilling of wells to the depth of 3-5 km; some of them shall be inclined and shall converge at the depth of 3-5 km approximately to one point and shall be used as inlet ones. At that, inclination angle of those wells is chosen so that possibility of spontaneous explosion can be eliminated. Casing of sections of shafts of those wells is performed with casing pipes; squibs and main charges are supplied to them. At that, round charges from explosive in covers are used as squibs and main charges and alternate with explosion initiators, as well as radio electronic devices for receiving destroy signal. Liquid explosives are supplied to wells simultaneously with charges. Destroy signal is supplied by means of radio electronic device. Boundaries of the formed underground cavity is determined after explosion by means of seismic pickups and two inclined diverging wells are drilled approximately from one point towards its edges for its further purposeful use.

EFFECT: lower labour intensity of cavity formation.

1 dwg