ELECTRICAL RESISTIVITY MEASUREMENT TO ANALYZE THE EFFECTS OF ROCK BLASTING

Electrical resistivity measurements have been used in engineering for many purposes. In this study, blasting effects on the back of blasted holes at a quarry bench have been put under evaluation. Earth resistivity of bench rock, limestone, was measured before and after blasting by electrical resistivity equipment with the same electrode positions. The resultant resistivity graphs demonstrate the blasting performed in this study influence slightly the rock resistivity of the rock mass situated 4 m from the blasted boreholes. However, after 3 group of blasting, each had 8 or 9 blasted boreholes, repeated near the tested rock, it was determined that due to fissure and micro scale crack separation rock mass resistivity had been changed more remarkably.