METHOD FOR BORE MINING OF UNDERGROUND MINERAL FORMATIONS Russian patent published in 2006 - IPC E21C45/00 

Abstract RU 2278973 C1

FIELD: geotechnology, particularly bore mining in wide range of mining and geological conditions.

SUBSTANCE: method involves drilling bore extending for the full thickness of underground mineral formation; cutting the underground mineral formation in chamber coaxial to the bore with the use of water-jet devices. Before hydraulic formation cutting rock massif is moistened by supplying pressurized water in bore for a time period enough to expand moistened zone for necessary distance, wherein water pressure is less than pressure of hydraulic formation cutting. After formation moistening water-jet device is lowered in the bore to cut mineral in moistened zone adjoining the bore. After that formation moistening and cutting operations are repeated to create chamber having predetermined dimensions.

EFFECT: reduced power inputs for hydraulic rock cutting.

2 dwg

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RU 2 278 973 C1

Authors

Lavrushin Gennadij Alekseevich

Lavrushina Elena Gennad'Evna

Zvonarev Mikhail Ivanovich

Dates

2006-06-27Published

2004-12-14Filed