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A platform for research: civil engineering, architecture and urbanism
Surface and underground subsidence correlation
Underground subsidence survey technique at site where industrial and important surface structures limit underground extraction; survey stations established at surface and in existing roadways at each horizon, at intervals ranging from 21 m at surface to 10 m in deepest horizon; stations consisted of steel pins with 2 in. sq plate welded to top; stations were leveled periodically from bench marks in each seam.
Surface and underground subsidence correlation
Underground subsidence survey technique at site where industrial and important surface structures limit underground extraction; survey stations established at surface and in existing roadways at each horizon, at intervals ranging from 21 m at surface to 10 m in deepest horizon; stations consisted of steel pins with 2 in. sq plate welded to top; stations were leveled periodically from bench marks in each seam.
Surface and underground subsidence correlation
Colliery Eng
Turnbull, D. (author) / Potts, E.L.J. (author)
Colliery Engineering ; 35
1958
8 pages
Article (Journal)
English
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