CHINA MINE ENGINEERING

In this paper, when 1606 fully mechanized coal mining face passes through X3 collapse pillar, the coal and roof strata are broken, the roof management measures of grouting reinforcement and arrangement of bumping wedge are put forward, the layout technical scheme is described in detail. In field application, the mining speed of working face is increased from 3.2m/d to 4.5m/d, avoid roof pressure. After grouting and wedge support, the coal wall and roof of the working face remain stable, the working face took 10 days to pass through the collapse column, and achieved remarkable application results.