Aggregates Manager

PULL-OUT GUIDE ILLUSTRATED OPERATIONS Going Underground — Roof Control The width of the entry has an effect on roof stability. Each mine has its own characteristics that affect roof control. It is best to establish the mine entry on a bedding plane. The direction of the mine into the stone also affects roof stability. Training hours are mandated by MSHA. On-the-job training is invaluable. By Mary Foster, Contributing Editor

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• OPERATIONS ILLUSTRATED: Going Underground: By letting geology dictate the mine plan and using technology to improve the stability of the roof, producers can improve safety in underground operations.