Current Issue Highlights
The Real Relationship Between Cracks and Vibrations
By Thierry Bernard
Four sample houses were equipped with five types of instruments for over 18 months, in order to learn if there is a relationship between the evolution of damage to existing constructions and the seismic levels of vibrations created by mine blasts. This article presents the results of this unique study.
Metal/NonMetal Serious Accident Alert
PPV. SD. Really? Still??
By Doug Anderson
This article reviews the background in the development of using PPV and SD in blast vibration criteria. Alternative criteria to avoid damage to adjacent structures and solid materials is explored. How such criteria might be studied and evaluated is discussed.