Seismic vibrations of complex relief of the surface of the naryn canyon (on the Norin river in Kyrgyzstan) during large-scale underground explosions

Abstract

In this paper the problem of the propagation of seismic blast waves in a deformable half-space with complex free surfaces of the Noryn Canyon (on the Noryn River in Kyrgyzstan) during large-scale underground explosions is discussed. In the explosion, according to a specially developed technique camouflage action charges were used. It was found that, granites in the fault zone are intensely fragmented and fractured. On the plane of the cracks, traces of sliding and friction clay are noticeable. The lowest values of elastic wave velocities are observed in the zones of tectonic cracks and in the surface of the massif. With depth, the velocity increases similarly to the change in fracturing. A theoretical formulation, solution methods and algorithm for the problem of propagation of seismic blast waves in a viscoelastic half-space (with a complex relief of the free surface) are proposed. The aim of the work is to study their dynamic behavior, create a methodology, develop and implement ideas when conducting full-scale experiments and measuring parameters that determine the dynamic behavior of half-space with complex surface and ground rails under seismic and explosive effects. Field experiments and corresponding theoretical studies in this formulation were carried out for the first time.