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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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Synthesis - summary -complete formula - extraction of resources
summary complete formula
Extraction of Resources (Technische Universiteit Delft)
·
Soil
classification
·
RQD
·
RMR
·
UCS test
·
SURFACE -
EXCAVATION. LOADING AND CASTING UNITS
·
Excavation
methods
·
Underground
mining Methods
·
Shaft
location
·
Wast
support method
·
Production
(m3)
·
Cycle time
·
Principal Stresses
·
Mohr's
circle of stress Derivation
·
Estimating
horizontal in situ stress
Vertical compression- assumptions
Vertical compression- assumptions
·
Stress magnitude
and rock cracking around excavations
·
Principal
stress directions
·
Initial σ and their
measurements-Hydraulic fracturing
And more….
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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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