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9 results returnedTimbering along the robbing line :factors influencing falls of roof in coal mines
Stop, look and listen! :the roof is going to fall
State laws relating to coal-mine timbering
Timbering regulations in certain coal mines of Pennsylvania, West Virginia, and Ohio
A study of falls of roof and coal in mines in the number 8 field of eastern Ohio
Roof support in coal mines in the Irwin, Greensburg and Latrobe Basins, Westmoreland County, Pa.
A study of falls of roof and coal in mines of Harrison County, West Virginia
A study of mine roof of the Pittsburgh coal bed in the Pittsburgh mining district
Timber withdrawing and devices used for this purpose in some coal mines
Published Year
Subject
- Mine timbering (9) *
- Coal mines and mining (4)
- Coal mines and mining--Pennsylvania (2)
- Coal mines and mining--Safety measures (2)
- Coal mines and mining--Ohio (1)
- Coal mines and mining--Pennsylvania--Westmoreland County (1)
- Coal mines and mining--West Virginia (1)
- Mining engineering (1)
- Mining law (1)
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