O.A.Vovk Time characteristics of seismic waves while explosion of single and group charges of different construction |
Applied hydromechanics, Vol. 6 (78) ¹ 3, (2004) |
| Time parameters of the longitudinal P and surface R seismic waves depending on charge construction and soil conditions are considered. Engineering correlation for determination of time of accelerated displacement to maximum in the longitudinal waves t+ and accelerated period of oscillation in surface waves TR depending on different factors using mathematical treatment of the experimental data were received. It was displayed that in the long wave while explosion of single point charge period of oscillation do not depend on a distance r but is a function of the charge mass q and soil characteristics. While explosion of cylindrical single and group charges ratio of the charge length to it's diameter influence magnitude of period. Time parameters of the surface waves change with length r also. While explosion of dispersal drill charges in perpendicular to series of drills direction up to definite distance (from 2 to 6l, where l - length of chain of charges) not all the total mass of charges take part in forming of seismic wave (qñêâ ? n, where n - quantity of holes) but some effective mass qeff < qr ? n. Dependence qeff from different factors while explosion of horizontal lengthening and dispersal vertical drill charges is given in the paper. |
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| TEXT LANGUAGE: Russian |