Abstract
50101 working face roof is typical compound roof in Guantun coal mine. Gateway design uses anchor-net + anchor rope supporting method. Sinking large roof abscission layer,the maximum abscission reached 450 ~ 500 mm Within one month after the construction .Anchor cable faults is frequently. In order to solve the above problem, We proposed to anchor cable φ15.24 mm changed toφ21.60 cable and Mining steel i-beam changed to W steel band . We can improve the support strength of anchor cable. With new support mode, We successfully make the roof abscission layer of subsidence and anchor cable fracture rate decline .
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