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Compressibility and bearing strength of coal in place :tests of lateral compression of Pittsburgh coal bed

A study of roof in Pennsylvania mines contiguous to Monongahela River

Experiments on strength of small pillars of coal in the Pittsburgh bed

Published Year

• 1930-1939 (3) *

Subject

• Coal mines and mining--Pennsylvania--Pittsburgh (3) *

Author

• Greenwald, H. P. (2)
• Avins, S. (1)
• Calverley, J. G. (1)
• Hartmann, Irving. (1)
• Howarth, H. C. (1)
• Paul, J. W. (1)
• Rice, G. S. (1)

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