THE IMPACT OF BLASTING DEPTH ON THE INTENSITY OF GROUND VIBRATIONS
A. TOOMIK
North-East Estonian Department
Institute of Ecology,
15 Pargi, Jõhvi
41537 Estonia
T. TOMBERG
Department of Mining
Tallinn Technical University,
82 Kopli, Tallinn
10412 Estonia
| The anisotropic properties of sedimentary overburden rocks, vertical joints and horizontal planes of discontinuity between layers affect the properties of vibration medium. Measurements of vibration velocity for various blasting depths between charges and endangered objects were performed. The growth of the share of blasting depth, i.e. the perpendicular to layers component of distance between charge and object causes a more intensive attenuation of the vibration velocity. The peak particle velocity attenuation as a function of blasting depth for most usable scaled distances was elaborated. |