Basic regression control blasting limits
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This document contains blast design information for 16 blasts including: weight of explosives used, hole depth and diameter, loading factor, predicted peak particle velocity (PPV), number of delays per hole, and spacing between blasts and structures. The blasts increase in depth from 13 to 50 meters and PPV decreases from 47.72 to 12.96 mm/s.
Basic regression control blasting limits
- 1. Weight 2.08 kg Minimum BR 0.6 kg/m3 Length (in hole) 0.36 m Design Level 13.6 (-m) Diameter 76 mm PPV Limit 50 mm/s Density 1.2 g/cm Constant A 714.4000 Loading Factor 5.44 kg/m Constant B -1.600000 Drilling grid Hole Spacing Distance to Rock head Sub Drill Stemming No. of Total Charge MIC Charge MIC Blast Ratio PPV Paid Delays per Offset Structure level Between Sticks in hole Length Rock Hole (m) (m) (m) (-m) (m) (m) per delay (kg) (m) (kg) (kg/m3) (mm/s) (m) (m) (No.) 2 2.5 13 10 2 0.6 2 17.65 0.72 4.16 0.63 36.89 3.6 5.6 4.2 2 2.5 15 10.9 2 0.6 3 17.46 1.08 6.24 0.74 40.58 2.7 4.7 2.8 2.5 2.5 17.5 11.1 2 0.6 5 19.50 1.8 10.4 0.69 47.72 2.5 4.5 1.9 2.5 2.5 20 11.4 2 0.6 6 18.99 2.16 12.48 0.72 44.59 2.2 4.2 1.5 2.5 2.5 22.5 11.7 2 0.6 8 18.65 2.88 16.64 0.77 46.49 1.9 3.9 1.1 2.5 2.5 25 11.9 2 0.6 9 18.72 3.24 18.72 0.81 43.16 1.7 3.7 1.0 2.5 2.5 27.5 11.9 2 0.6 9 18.72 3.24 18.72 0.81 37.06 1.7 3.7 1.0 2.5 2.5 30 12 2 0.6 9 18.72 3.24 18.72 0.83 32.24 1.6 3.6 1.0 2.5 2.5 32.5 12.1 2 0.6 8 16.74 2.88 16.64 0.77 25.81 1.5 3.5 1.0 2.5 2.5 35 11.1 2 0.6 11 22.88 3.96 22.88 0.81 29.58 2.5 4.5 1.0 2.5 2.5 37.5 11.5 2 0.6 10 20.80 3.6 20.8 0.81 24.54 2.1 4.1 1.0 2.5 2.5 40 11.5 2 0.6 10 20.80 3.6 20.8 0.81 22.14 2.1 4.1 1.0 2.5 2.5 42.5 11.6 2 0.6 9 19.50 3.24 18.72 0.78 18.47 2 4 1.0 2.5 2.5 45 11.7 2 0.6 9 19.01 3.24 18.72 0.78 16.85 1.9 3.9 1.0 2.5 2.5 47.5 12 2 0.6 8 17.21 2.88 16.64 0.77 14.07 1.6 3.6 1.0 2.5 2.5 50 12 2 0.6 8 17.21 2.88 16.64 0.77 12.96 1.6 3.6 1.0 Row Spacing Hole Length Explosive Information Site Information