Vibration Control Blasting for Low Stability Final Wall

A combination of electronic detonators and advanced vibration and frequency modelling software was used to conduct vibration critical blasting of a low stability final wall. Regular signature holes were incorporated into production blasting patterns allowing continual refinement of the vibration prediction model.


Vibration Control using an iPhone - Accuracy, Validation and Potentialities

This case study presents the comparison of vibration results, made by traditional seismographs, in comparison with an iPhone. Was built an attenuation laws via the normal procedure and another from the data collected by the iPhone Vibration Monitoring device and predictions were made prior to a set of blasts.


Wave Transmission Response of Large Structure to High Frequency Blasting Vibration

Measurements reported in this paper tested the hypothesis that because of high frequency excitation, urban structures are not perturbed as greatly as assumed. Major findings are summarized by scaled comparison of response of urban structures to high frequency excitation with that of houses to lower frequency excitation.


Weak Blasting to Take Advantage of Natural Rock Mass Fissures is not Economical

This is a practical article with the aim to dispel the false premise that low explosive costs always save money, an opinion which the authors have found to be believed and followed by many blasters. The most economical practice is to always blast as if the rock mass is competent.


Which Explosive to use? ANFO, Emulsions or Blends?

The economics for the choice of explosives: ANFO, emulsion or blends (both dry and wet) for mines with mixed conditions (both dry and wet holes) is presented.