nowadays, tunneling in urban areas is a common activity for a variety of transportations such as subways, water supply, lifelines andsewers that may require blast operations. the characteristics of stress waves of the blast are quite different from earthquake waves. the blast waves are usually of high frequency content, short duration, equality of amplitudes in horizontal and vertical direction...

nowadays, tunneling in urban areas is a common activity for a variety of transportations such as subways, water supply, lifelines andsewers that may require blast operations. the characteristics of stress waves of the blast are quite different from earthquake waves. the blast waves are usually of high frequency content, short duration, equality of amplitudes in horizontal and vertical direction...

We study the interaction of a seismic wave-field with a spherical acoustic gas-or fluid-filled cavity. The intention of this study is to identify characteristic features in the interaction that may help detecting cavities in the subsurface. This is important for many applications, as in particular the detection of underground nuclear explosions which are to be prohibited by the Comprehensive-Te...

We study the interaction of a seismic wave-field with a spherical acoustic gasor fluid-filled cavity. The intention of this study is to clarify whether seismic resonances can be expected, a characteristic feature, which may help detecting cavities in the subsurface. This is important for many applications, as in particular the detection of underground nuclear explosions which are to be prohibit...

This paper presents a two-dimensional hydrodynamic simulation tool for studying the effectiveness of hypervelocity kinetic-energy impactors (KEIs) and nuclear subsurface explosions for disrupting (i.e., dispersively pulverizing) hazardous asteroids. High-order methods on GPUs (Graphics Processing Units) are employed for hydrodynamic simulations of such complex physical problems. Because highord...

In the past decade, ambient vibration measurements found numerous applications on unstable rock slopes and developed into a powerful tool for site characterization of slope instabilities. this study, first time were applied to mass strongly disturbed damaged by subsurface explosions. The above ammunition storage chamber at Mitholz (Switzerland) is especially interesting because geology below se...

The objective of this new project is to investigate the generation of complex seismic waves by explosions in media with realistic three-dimensional (3D) heterogeneity, including topography. To do this, we use information on subsurface heterogeneity from nuclear test sites to develop 3D models that have the characteristics of the emplacement media for actual nuclear tests. We then run calculatio...

Recent work is changing our understanding of phreatomagmatic maar-diatreme eruptions and resulting deposits. In previous models, explosions were often inferred to take place only at the base of a diatreme, with progressive downward migration due to a cone of depression in the host aquifer. However, diatremes themselves contain much water that is heterogeneously distributed, and field evidence s...