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Conceptual mine planning
Mine planning and design
From Yangon Technologcal University
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126 Pages
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Pillar Design
The Safety Factor (SF) is the pillar strength divided by the pillar load.
Safety Factor = Pillar Strength / Pillar Load
SF=Sp/δp
Pillar Strength – is a function of both a size effect and a shape effect.
1. Size Effect
2. Shape Effect
Size Effect – The average strength decreases as specimen size increases. ....
Mine planning and design (Yangon Technological University)
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Free ebook Number 02:
Unit 14-Underground mining methods
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