MODULE 01 · UBC METHOD
Mining Method Selection
Describe the orebody and rock mass. Eight methods are scored with the UBC system — any criterion scoring −49 rules a method out.
Input parameters
Orebody Characteristics
Rock Mass Rating (RMR)
Rock Substance Strength (RSS = UCS / σ₁)
Live recommendation
Top choice
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MODULE 02 · BLASTING
Blasting Models
Estimate the powder factor from rock blastability, or predict mean fragment size with the Kuz-Ram model.
Rock description
Blastability
Powder factor
0kg/t
Density index (SGI)
0
Lilly (1986): BI = 0.5 (RMD + JPS + JPO + SGI + H), PF = 0.004 × BI.
Blast design
Fragmentation prediction
Mean fragment size X50
0cm
Powder factor
0kg/m³
Powder factor
0kg/t
Charge per hole
0kg
Rock per hole
0m³
MODULE 03 · GROUND VIBRATION
Vibration Prediction & Control
Square-root scaled-distance site law: PPV = K (D / √W)−α. Find the maximum charge per delay that keeps you under the limit.
Site & blast
Typical constants: hard rock K ≈ 1140, α ≈ 1.6. Calibrate K and α from your own monitoring data.
Separating holes by at least 8 ms with electronic delays keeps their vibration waves from adding together.
Separating holes by at least 8 ms with electronic delays keeps their vibration waves from adding together.
Prediction
Predicted PPV
0mm/s
Max charge / delay
0kg
Scaled distance
0m/kg½
Charge headroom
0%
MODULE 04 · DRILLING
Drill Pattern Design
Rule-of-thumb geometry for production rings and benches, and for parallel-hole cuts in development headings.
Hole & ratios
Hard rock usually needs a tighter burden ratio (close to 25); softer rock allows a wider one (close to 40). In ring drilling, keep the distance between hole ends (toes) under 1.5 × burden to avoid oversize boulders.
Recommended geometry
Burden
0m
Spacing
0m
Max toe spacing
0m
Area per hole
0m²
Cut holes
Cut specification
1st square burden
0m
Max blast-hole burden
0m
Spacing
0m
Relief / blast hole
0×
MODULE 05 · PILLARS
Pillar Design & Stability
Tributary-area stress against Obert-Duvall strength, with lab UCS scaled down to full pillar size.
Geometry & rock
Lab-to-pillar size effect
Factor of safety
Pillar stress
0MPa
Pillar strength
0MPa
In-situ strength C₁
0MPa
W / H ratio
0
MODULE 06 · OPEN STOPES
Stope Stability — Mathews Graph
Modified stability number N′ = Q′ · A · B · C against hydraulic radius, judged with Mawdesley (2001) stability-probability lines.
Modified Q′ (rock quality)
Stability factors
Stope surface geometry
Stability assessment
Q′
0
N′
0
Hydraulic radius
0m
N′ for 95% stable
0
Isoprobability lines: ln N′ = 1.8197 ln HR − 0.0201 (95%) and − 0.9625 (90%), from Mawdesley et al. (2001) via a secondary source. Check them against the original paper before using for design.