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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

Progress report :experiments on strength of small pillars of coal in the Pittsburgh bed

Effect of changes in moisture and temperature on mine roof.

Published Year

• 1930-1939 (3)
• 1940-1949 (2)

Subject

• Coal mines and mining--Pennsylvania--Pittsburgh (5) *
• Mine roof control--Pennsylvania--Pittsburgh (1)

Author

• Greenwald, H. P. (4)
• Hartmann, Irving. (3)
• Howarth, H. C. (2)
• Avins, S. (1)
• Calverley, J. G. (1)
• Paul, J. W. (1)
• Rice, G. S. (1)

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