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Mining Publication: Assessment and Application of a Single-Charge Blast Test at the Kiruna Mine, Sweden
Keywords: Blasting
Original creation date: May 2011
Authors: DR Tesarik, WA Hustrulid, U Nyberg
Peer Reviewed Journal Article - May 2011
Download PDF Document (0.81 MB)
NIOSHTIC2 Number: 20039906
Blasting Fragm 2011 May; 5(1):47-72
Peak particle velocity (PPV) and distance measurements from a single-charge blast test conducted by Swedish researchers in iron ore at the Kiruna Mine in northern Sweden are presented. They are used along with theoretical PPVs calculated using an equation based on hydrodynamics to determine a damage distance range caused by a single charge. This equation, which relates PPV to explosive properties, charge geometry, and distance from a charge, was then applied to a charge of different geometry that was used in drift rounds. A comparison between calculated and measured PPVs suggests that the stoping holes likely damage the easer hole locations, and the easer holes produce damage to the perimeter hole locations. The practical effect is that typical damage limit predictions based on measurements conducted in fresh or undamaged rock are conservative. This suggests that even when perimeter control is not exercised in drifting (i.e., the perimeter holes are fully loaded), the resulting damage may be less than normally expected due to the wave damping effect of the pre-damaged rock. Due to the damping effect, poor perimeter blasting practices are somewhat self correcting. However, it must be strongly emphasized that well-engineered blast designs with perimeter control are highly beneficial in relation to both economic and safety aspects.
Image of publication Assessment and Application of a Single-Charge Blast Test at the Kiruna Mine, SwedenPeer Reviewed Journal Article - May 2011
Download PDF Document (0.81 MB)
NIOSHTIC2 Number: 20039906
Blasting Fragm 2011 May; 5(1):47-72
See Also
Blast Wave Propagation in Underground Mines
A Century of Bureau of Mines/NIOSH Explosives Research
Fatal Accidents Due to Flyrock and Lack of Blast Area Security and Working Practices in Mining
A Gas Pressure-Based Drift Round Blast Design Methodology
A Hydrodynamics-Based Approach for Predicting the Blast Damage Zone in Drifting as Demonstrated Using Concrete Block Data
Low Temperature Limits for Mixing Recycled Oil, Diesel Fuel, and Ammonium Nitrate to Make ANFO-Type Blasting Agents
Safe Distances for Blasting Wiring from Commonly Encountered Underground Electromagnetic Energy Sources
A Summary of Fatal Accidents Due to Flyrock and Lack of Blast Area Security in Surface Mining, 1989 to 1999
Technology News 522 - Blast Area Security: Flyrock Safety
Toolbox Training on Flyrock Awareness
Page last reviewed: June 24, 2016
Page last updated: September 21, 2012
Content source: National Institute for Occupational Safety and Health, Mining Program
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