محاسبهء پارامتر فراوانی درزه، فاکتور کیفیت و مدول تغییر شکل سنگ

 In this paper crack per meter, rock quality and in situ deformation module were determined using micro and petit seismic methods. In this context, the Vs velocity value measurements inside the exploratory galleries, around the flat jacks, at a dam site were performed. The results showed that, from the obtained relation between the dominant frequency and the in situ deformation factor of a rock, one could attribute this relation for rest of the rocks in different parts of the exploratory galleries. Although, the main results of the petit seismic is based upon the in situ flat jack results, but in the flat jack operation the results belong only to few points while in the petit seismic measurements one may arrange different part of the rock in the exploratory galleries with respect to the in situ deformation module. The petit seismic method is cost effective and also gives a better insight to geo engineers and to design tunnels and dam projects with finer constraints.