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Surface Blast Design: Using the rock and blast design properties highlighted in the table; when the bank length for each blasting face is 600 feet and the bank height is 30 feet, calculate the number of blastholes required and the spacing between blastholes ( Overburden Characteristics Specific Weight (w) Burden Depth (b) Charge Depth (k) Sub-drill Depth (a) Hole Diameter (dhole) Loading Density (LD) Powder Factor (PF) Value (units) 175 (lb/ft³) 20 (ft) 85% of d 0 (ft) 1 (ft) 70 (lb/ft) 0.65 (lb/ton)

Surface Blast Design: Using the rock and blast design properties highlighted in the table; when the bank length for each blasting face is 600 feet and the bank height is 30 feet, calculate the number of blastholes required and the spacing between blastholes ( Overburden Characteristics Specific Weight (w) Burden Depth (b) Charge Depth (k) Sub-drill Depth (a) Hole Diameter (dhole) Loading Density (LD) Powder Factor (PF) Value (units) 175 (lb/ft³) 20 (ft) 85% of d 0 (ft) 1 (ft) 70 (lb/ft) 0.65 (lb/ton)

Applications and Investigations in Earth Science (9th Edition)
Applications and Investigations in Earth Science (9th Edition)
9th Edition
ISBN:9780134746241
Author:Edward J. Tarbuck, Frederick K. Lutgens, Dennis G. Tasa
Publisher:Edward J. Tarbuck, Frederick K. Lutgens, Dennis G. Tasa
Chapter1: The Study Of Minerals
Section: Chapter Questions
Problem 1LR
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24. Surface Blast Design: Using the rock and blast design properties highlighted in the table; when the bank length for each blasting face is 600 feet and the bank height is 30 feet, calculate the number of blastholes required and the spacing between blastholes ( Overburden Characteristics Specific Weight (w) Burden Depth (b) Charge Depth (k) Sub-drill Depth (a) Hole Diameter (dhole) Loading Density (LD) Powder Factor (PF) Value (units) 175 (lb/ft³) 20 (ft) 85% of d 0 (ft) 1 (ft) 70 (lb/ft) 0.65 (lb/ton)
Transcribed Image Text:24. Surface Blast Design: Using the rock and blast design properties highlighted in the table; when the bank length for each blasting face is 600 feet and the bank height is 30 feet, calculate the number of blastholes required and the spacing between blastholes ( Overburden Characteristics Specific Weight (w) Burden Depth (b) Charge Depth (k) Sub-drill Depth (a) Hole Diameter (dhole) Loading Density (LD) Powder Factor (PF) Value (units) 175 (lb/ft³) 20 (ft) 85% of d 0 (ft) 1 (ft) 70 (lb/ft) 0.65 (lb/ton)
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