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11 results returnedTimbering 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
Falls of roof and coal in the Book Cliffs and Wasatch Plateau Coal Fields in Utah
A study of falls of roof and coal in mines of Lincoln County, Wyoming
A study of mine roof of the Pittsburgh coal bed in the Pittsburgh mining district
A study of falls of roof and coal in Northern Colorado
A study of falls of roof and coal, Rock Springs Coal District, Sweetwater County, Wyo.
Timber withdrawing and devices used for this purpose in some coal mines
Published Year
Subject
- Mine timbering (11) *
- Coal mines and mining (3)
- Coal mines and mining--Pennsylvania (2)
- Mine roof control (2)
- Coal mines and mining--Ohio (1)
- Coal mines and mining--Pennsylvania--Westmoreland County (1)
- Coal mines and mining--Utah (1)
- Coal mines and mining--West Virginia (1)
- Coal mines and mining--Wyoming (1)
- Mine accidents--Colorado (1)
- Mine accidents--Wyoming (1)
Author
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