GEAR FOR ISOLATION OF ROCK WORKINGS Russian patent published in 1994 - IPC

FIELD: mining industry. SUBSTANCE: anchoring space 2 limited on two sides with lateral watertight coffer-dams and filled with crushed rock and water is built between bearing concrete layer of lining 1 and rock. From below there are installed branch pipes 4 for delivery of water. From above there are mounted into free part unfilled with crushed rock branch pipe 9 for discharge of crude oil communicating with pipe-line 11 and gauge 12 of water level. Crude oil infiltrating into anchoring space 2 gets into water, lifts and accumulates on water surface. From funnel 10 crude oil flows into pipe-line 11 and is discharged from working. EFFECT: increased safety of workings. 2 dwg