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Economic benefits of systematic roof bolting in Ziegler No. 3 Mine, Bell & Zoller Coal & Mining Co., Williamson County, Ill.,

Anchorage capacities in thick coal roofs

Published Year

• 1950-1959 (1)
• 1980-1989 (1)

Subject

• Coal mines and mining--Safety measures (2) *
• Mine roof bolting (2) *
• Mine accidents--Illinois (1)

Author

• Kelly, L. W. (1)
• Tadolini, Stephen C. (1)

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