| 摘要 |
A tunnel barrier ( 11 ) adapted to seal a mine tunnel, the tunnel barrier ( 11 ) comprising an inflatable bladder having a front wall ( 14 ), a rear wall ( 15 ) and a side wall ( 16 ) and being adapted to be inflated by a suitable gas, wherein the side wall is adapted to contact the tunnel walls, including the roof and floor to thereby seal the tunnel.
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