PNEUMOBOTTLE SUPPORT Russian patent published in 2014 - IPC E21D23/00 

FIELD: mining.

SUBSTANCE: proposed support comprises axially symmetric rectangular-cross-section air shell of two equal parts, pressure-gage and air feed hoses and device to fill and control air overpressure. Note here that said support is equipped with extra axially symmetric rectangular-cross-section air shell of two equal parts, pressure-gage and air feed hoses, independent of the main one and arranged between its parts. Note here that at initial stage, pressure in extra air shell is kept making not over 1/5 of main air shell pressure while extra shell height in as-filled state makes at least 1/3 of the support total height in air-filled state.

EFFECT: simplified design and erection, lower costs and higher reliability.

1 dwg