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Mining Publication: A Hydrodynamics-Based Approach for Predicting the Blast Damage Zone in Drifting as Demonstrated Using Concrete Block Data

August 2009

Image of publication A Hydrodynamics-Based Approach for Predicting the Blast Damage Zone in Drifting as Demonstrated Using Concrete Block Data

Rock falls involving a relatively small amount of material are a leading cause of injuries in underground mines in the United States. A contributing factor is unwanted blast damage and over-break. A goal of the United States National Institute for Occupational Safety and Health is to reduce the number of ground fall-related accidents by improving drift driving practices through the introduction of perimeter control blast designs. This paper presents a blast design technique based on a hydrodynamic method. Using commonly available explosive and geometry data, the theoretical particle velocity is calculated as a function of distance away from a cylindrical charge. A calibration factor is introduced to account for actual conditions by comparing the predicted values to a set of field data. The calibrated curve can then be applied for design. The paper introduces modifications to account for different explosives from those used in a calibration test. The application of the approach is demonstrated with respect to a data set from a large-scale concrete block test.

Authors: DR Tesarik, WA Hustrulid

Peer Reviewed Journal ArticleAugust - 2009

  • Adobe Acrobat - Portable Document Format (.PDF)

    0.90 MB

NIOSHTIC2 Number: 20036018

Blasting Fragm 2009 Aug; 3(2):141-166

 
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