The effects of rock mass properties on blast-Induced vibrations and geophysical properties

Intensity of blast-induced vibrations is affected by parameters such as the physical and mechanical properties of rock mass, explosive characteristics and blasting design. This study measured blasting-induced vibrations in the Kangal Open-Pit Coal Mine, the Tülü Open-Pit Boron Mine, the Kırka Open-Pit Boron Mine, and the TKI Çan Coal Mine fields. The results showed highly variable field constants (K=211.25–5955.74 and =0.82–2.32) and damping behaviors according to direction. Rock mass properties and possible directional variation were investigated by using different geophysical methods (electric resistivity, seismic refraction and multi-channel analysis of surface wave) and current sounding information. Then, rock mass rating (RMR), P- and S-wave velocities of the surrounding rocks have been constructed to estimate the peak particle velocities of related blast-induced vibrations. The proposed PPV model has a good correlation coefficient and hence it can be directly used in prediction of blast-induced vibrations in rocks. Standard errors and coefficient of correlations of the predicted blast-induced vibration parameters are obtained with respect to the observed field data. © 2017 European Association of Geoscientists and Engineers EAGE. All rights reserved.