立井掩护式金属骨架揭穿突出危险煤层

Uncovering Outburst Coal Seam with Shield Metal Skeleton Technology in Shaft

立井揭开急倾斜突出煤层,危险性大,增加了立井揭穿突出煤层施工难度系数,田南镇煤矿副立井采用施工掩护式金属骨架钻孔,并采取远距离放震动炮等措施,安全地揭开并穿过B6煤层,保障了煤矿的安全生产。

Shaft kick steeply inclined prominent seam, dangerous, increasing the Shaft uncovering prominent seam construction difficulty factor. Tiannan coal mine by shield metal skeleton drilling technology, and take remote vibration shot in seam uncovering,Security opened the seam and through B6, to protect the safety of coal production.