Disturbance factor effects on the selected geotechnical properties of the discontinuities

The cost of blasting operations is about thirty percentage of all production expenses for open pit mine operations. Discontinuities are one of the most important parameters for blasting operations. The persistency and the aperture of discontinuities are directly affected from the blasting efficiency. Blasting operations in open pit mines affect the discontinuities into the rock mass and change its properties.In this study, the field studies were computed for two different quarries and the effect of disturbance on discontinuities into the rock mass after blasting operations were studied.The specific charge for blasting were calculated for every blasting operation and the relationships between specific charge and change of the discontinuity aperture after the blasting operations were studied.Also particle size distribution were tried to be determined by considering spacing of discontinuities and the blasting parameters by using the image analyzing method.