LAGGING OF LINING OF ROCK WORKINGS Russian patent published in 1998 - IPC

FIELD: mining industry. SUBSTANCE: proposed lagging of lining of rock workings includes longitudinal and lateral bars which form metal grid and are interjoined. Lateral bars are bent along form of outer contour of frames of lining. Longitudinal bars are bent towards side of enclosing rock and bending arc corresponds to distance between internal flanges of adjacent frames of lining. Extreme and central bars are bearing ones and the rest are auxiliary ones. Ends of bearing longitudinal bars carry fixing arms repeating shape of flange outlines of special profile for side wrap of flanges of adjacent frames. EFFECT: improved reliability of laggings, decreased time for their installation. 3 dwg