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Stop, look and listen! :the roof is going to fall

How are men killed in mines by falls of roof and coal?

Area of unsupported roof in coal mines :conditions and factor[s] for consideration

Methods of development and pillar extraction in mining the Pittsburgh coal bed in Pennsylvania, West Virginia, and Ohio

Published Year

• 1920-1929 (3)
• 1930-1939 (1)

Subject

• Mining engineering (4) *
• Coal mines and mining--Safety measures (3)
• Coal mines and mining--Ohio (1)
• Coal mines and mining--Pennsylvania (1)
• Coal mines and mining--West Virginia (1)
• Mine timbering (1)

Author

• Paul, J. W. (4) *
• Plein, Leopold Nicholas, (1)

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