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You searched for: Topical Subjects Mine roof bolting. Remove constraint Topical Subjects: Mine roof bolting. Topical Subjects Coal miners. Remove constraint Topical Subjects: Coal miners.
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Two men with equipment putting up bolts to support the mine roof.
Two men running a roof bolter in Jamison No. 9 mine.
Miner putting bolts into the roof of a mine for support.
Miner putting bolts into the roof of a mine for support.
Miner putting bolts into the roof of a mine for support.
Two miners work on putting in roof bolts in the Pittsburgh Seam. Timber jack used to hold the roof while bolting.
Two miners put bolts in to the mine rood at Jamison No. 9.
Two miners work with a Joy roof bolt drill at Jamison No. 9.