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Among the important parameters determining the likelihood of occurrence of significant damage to engineering structures during an earthquake are the dynamic and seismic characteristics of the structures such as natural frequency, damping coefficient, and vulnerability index of the structure. In this article, the Nakamura method is applied to investigate the seismic stability of an earth-filled dam wall and the surface layer using microtremors. Measurements were taken at seven points on the dam crest and three poin...

In this paper, the main maritime exploration techniques have been analyzed, the seismic refraction, and the seismic reflection. Pursuant to the performed research, we considered the seismic reflection to be of interest, for which we shall suggest improvement in how the data is collected by proposing a hydrophone design. At present, the continuation of exploitation of the traditional basins of natural resources (gas, oil), as well as the emergence of new reserves, such as those in the Black Sea, make it compulsory ...

The study of the effect of blasting on bench stability is indispensable for the overall mine-s safety, in this perspective, we conducted a study in the limestone quarry, which is characterized by a highly fractured rock mass. While the quarry presents a steep topographic profile, the extraction is carried out on a single operating edge. The blasting operations in the quarry offer an unsatisfying fragmentation (high percentage of oversized boulders), important overbreak, and deformation to the bench-s face; these i...

The method of fundamental solutions is a meshless method that belongs to the Trefftz class of numerical methods. The method needs only the boundary to be defined using the set of boundary collocation nodes; it is mathematically effortless to program. One of the imperfections in the context of MFS is the fictitious boundary without any rigorous definition. The other fact that MFS suffers from is the nature of the characteristic matrix that is non-symmetric and fully populated. This issue is overcome by adopting the...